Dear Team, I have Upgraded our sugar CRM 11.0.6 to 12.0.3 & we are Getting CRM after login screen ( HTTP: 500 Internal Server Error Invalid subscription json data ) Please help what can i do for this issue

hi All, We have just upgraded our instance from 7.9.5 to 8.0.2 , upgrade failed at post_upgrade checks we are witnessing following error on all module pages - Unknown column 'dashboards.default_dashboard' HTTP: 500 Internal Server Error An exception occurred…