I attached httpd log, php log, sugarcrm log respectively , for your reference -

httpd Log --

[Tue May 07 09:31:06.261326 2024] [http2:warn] [pid 2441] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 09:31:06.281817 2024] [mpm_prefork:notice] [pid 2441] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 09:31:06.281868 2024] [core:notice] [pid 2441] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Tue May 07 10:33:50.764321 2024] [proxy_fcgi:error] [pid 2518] (70007)The timeout specified has expired: [client 10.134.75.181:62174] AH01075: Error dispatching request to : (polling), referer: 192.168.147.150/.../
[Tue May 07 11:03:26.341279 2024] [mpm_prefork:notice] [pid 2441] AH00170: caught SIGWINCH, shutting down gracefully
[Tue May 07 11:03:32.657099 2024] [suexec:notice] [pid 21280] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue May 07 11:03:32.670012 2024] [lbmethod_heartbeat:notice] [pid 21280] AH02282: No slotmem from mod_heartmonitor
[Tue May 07 11:03:32.670077 2024] [http2:warn] [pid 21280] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
[Tue May 07 11:03:32.670082 2024] [http2:warn] [pid 21280] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 11:03:32.674263 2024] [mpm_prefork:notice] [pid 21280] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 11:03:32.674293 2024] [core:notice] [pid 21280] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Tue May 07 12:01:03.615213 2024] [mpm_prefork:notice] [pid 21280] AH00170: caught SIGWINCH, shutting down gracefully
[Tue May 07 12:01:09.973935 2024] [suexec:notice] [pid 31567] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue May 07 12:01:09.991655 2024] [lbmethod_heartbeat:notice] [pid 31567] AH02282: No slotmem from mod_heartmonitor
[Tue May 07 12:01:09.991707 2024] [http2:warn] [pid 31567] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
[Tue May 07 12:01:09.991712 2024] [http2:warn] [pid 31567] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 12:01:09.995238 2024] [mpm_prefork:notice] [pid 31567] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 12:01:09.995269 2024] [core:notice] [pid 31567] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
PHP Log --

[07-May-2024 05:56:44 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:46 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:46 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:48 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/sugarcrm/modules/dg_SLA_History/dg_SLA_History_sugar.php on line 19
[07-May-2024 05:56:48 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/ModuleInstall/ModuleScanner.php on line 1128
[07-May-2024 06:33:28 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/custom/modules/Leads/clients/base/layouts/convert-main/convert-main.php on line 1
[07-May-2024 06:36:41 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/modules/dg_SLA_History/clients/base/filters/basic/basic.php on line 1
[07-May-2024 06:38:28 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/sugarcrm/cache/modules/dg_SLA_History/dg_SLA_Historyvardefs.php on line 3
[07-May-2024 06:39:16 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/include/SubPanel/SubPanelDefinitions.php on line 696



+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
SgarCRM Log --

Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5dfd9d26-0c48-11ef-b6a4-0217b7a1b466 (Hint News Job) failed in CRON run, Job 5dfd9d26-0c48-11ef-b6a4-0217b7a1b466 (Hint News Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5e1f24a0-0c48-11ef-b134-0217b7a1b466 (Hint Init Job) failed in CRON run, Job 5e1f24a0-0c48-11ef-b134-0217b7a1b466 (Hint Init Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5e232e56-0c48-11ef-8930-0217b7a1b466 (Hint Register Config Job) failed in CRON run, Job 5e232e56-0c48-11ef-8930-0217b7a1b466 (Hint Register Config Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:01 2024 [16094][1][FATAL] Job runs too frequently, throttled to protect the system.
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 81466b5a-0c48-11ef-8bbe-0217b7a1b466 (Apply Subscription Entitlements When They Are Changed) failed in CRON run, Job 81466b5a-0c48-11ef-8bbe-0217b7a1b466 (Apply Subscription Entitlements When They Are Changed) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 816a84a4-0c48-11ef-9ae5-0217b7a1b466 (Hint News Job) failed in CRON run, Job 816a84a4-0c48-11ef-9ae5-0217b7a1b466 (Hint News Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 816ea3fe-0c48-11ef-96c6-0217b7a1b466 (Hint Init Job) failed in CRON run, Job 816ea3fe-0c48-11ef-96c6-0217b7a1b466 (Hint Init Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 81728924-0c48-11ef-b456-0217b7a1b466 (Hint Register Config Job) failed in CRON run, Job 81728924-0c48-11ef-b456-0217b7a1b466 (Hint Register Config Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated

I attached httpd log, php log, sugarcrm log respectively , for your reference -

httpd Log --

[Tue May 07 09:31:06.261326 2024] [http2:warn] [pid 2441] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 09:31:06.281817 2024] [mpm_prefork:notice] [pid 2441] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 09:31:06.281868 2024] [core:notice] [pid 2441] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Tue May 07 10:33:50.764321 2024] [proxy_fcgi:error] [pid 2518] (70007)The timeout specified has expired: [client 10.134.75.181:62174] AH01075: Error dispatching request to : (polling), referer: 192.168.147.150/.../
[Tue May 07 11:03:26.341279 2024] [mpm_prefork:notice] [pid 2441] AH00170: caught SIGWINCH, shutting down gracefully
[Tue May 07 11:03:32.657099 2024] [suexec:notice] [pid 21280] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue May 07 11:03:32.670012 2024] [lbmethod_heartbeat:notice] [pid 21280] AH02282: No slotmem from mod_heartmonitor
[Tue May 07 11:03:32.670077 2024] [http2:warn] [pid 21280] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
[Tue May 07 11:03:32.670082 2024] [http2:warn] [pid 21280] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 11:03:32.674263 2024] [mpm_prefork:notice] [pid 21280] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 11:03:32.674293 2024] [core:notice] [pid 21280] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Tue May 07 12:01:03.615213 2024] [mpm_prefork:notice] [pid 21280] AH00170: caught SIGWINCH, shutting down gracefully
[Tue May 07 12:01:09.973935 2024] [suexec:notice] [pid 31567] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue May 07 12:01:09.991655 2024] [lbmethod_heartbeat:notice] [pid 31567] AH02282: No slotmem from mod_heartmonitor
[Tue May 07 12:01:09.991707 2024] [http2:warn] [pid 31567] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
[Tue May 07 12:01:09.991712 2024] [http2:warn] [pid 31567] AH02951: mod_ssl does not seem to be enabled
[Tue May 07 12:01:09.995238 2024] [mpm_prefork:notice] [pid 31567] AH00163: Apache/2.4.41 () configured -- resuming normal operations
[Tue May 07 12:01:09.995269 2024] [core:notice] [pid 31567] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
PHP Log --

[07-May-2024 05:56:44 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:45 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:46 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 881
[07-May-2024 05:56:46 UTC] PHP Warning: Undefined array key "quantity" in /var/www/html/sugarcrm/include/Entitlements/SubscriptionManager.php on line 882
[07-May-2024 05:56:48 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/sugarcrm/modules/dg_SLA_History/dg_SLA_History_sugar.php on line 19
[07-May-2024 05:56:48 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/ModuleInstall/ModuleScanner.php on line 1128
[07-May-2024 06:33:28 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/custom/modules/Leads/clients/base/layouts/convert-main/convert-main.php on line 1
[07-May-2024 06:36:41 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/modules/dg_SLA_History/clients/base/filters/basic/basic.php on line 1
[07-May-2024 06:38:28 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/sugarcrm/cache/modules/dg_SLA_History/dg_SLA_Historyvardefs.php on line 3
[07-May-2024 06:39:16 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/sugarcrm/include/SubPanel/SubPanelDefinitions.php on line 696



+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
SgarCRM Log --

Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5dfd9d26-0c48-11ef-b6a4-0217b7a1b466 (Hint News Job) failed in CRON run, Job 5dfd9d26-0c48-11ef-b6a4-0217b7a1b466 (Hint News Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5e1f24a0-0c48-11ef-b134-0217b7a1b466 (Hint Init Job) failed in CRON run, Job 5e1f24a0-0c48-11ef-b134-0217b7a1b466 (Hint Init Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:04:02 2024 [15947][1][FATAL] Job 5e232e56-0c48-11ef-8930-0217b7a1b466 (Hint Register Config Job) failed in CRON run, Job 5e232e56-0c48-11ef-8930-0217b7a1b466 (Hint Register Config Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:01 2024 [16094][1][FATAL] Job runs too frequently, throttled to protect the system.
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 81466b5a-0c48-11ef-8bbe-0217b7a1b466 (Apply Subscription Entitlements When They Are Changed) failed in CRON run, Job 81466b5a-0c48-11ef-8bbe-0217b7a1b466 (Apply Subscription Entitlements When They Are Changed) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 816a84a4-0c48-11ef-9ae5-0217b7a1b466 (Hint News Job) failed in CRON run, Job 816a84a4-0c48-11ef-9ae5-0217b7a1b466 (Hint News Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 816ea3fe-0c48-11ef-96c6-0217b7a1b466 (Hint Init Job) failed in CRON run, Job 816ea3fe-0c48-11ef-96c6-0217b7a1b466 (Hint Init Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] /var/www/html/sugarcrm/modules/SchedulersJobs/SchedulersJob.php Error: 8192: Creation of dynamic property SchedulersJob::$errors is deprecated
Tue May 7 08:05:02 2024 [16088][1][FATAL] Job 81728924-0c48-11ef-b456-0217b7a1b466 (Hint Register Config Job) failed in CRON run, Job 81728924-0c48-11ef-b456-0217b7a1b466 (Hint Register Config Job) failed, errstr: Creation of dynamic property SchedulersJob::$errors is deprecated

Hi Suraj Kumar ,

it seems to be a memory exhaustion... try to increase your memory allocation on php.ini 

memory_limit = 1024M