WAMP local sugar from backup 404

Hi.  I'm trying to set up a local version of Sugar 11 from a cloud backup.    I'm fairly confident the prerequisites/requirements have been met (https://support.sugarcrm.com/Documentation/Sugar_Versions/11.0/Ent/Installation_and_Upgrade_Guide/#Installation_Prerequisites).  

I have a clean version of Sugar 11 on localhost which seems to work, I'm using WAMP 64-bit, PHP 7.3.21 (or 7.4.9) , MySQL 5.7.31, Apache 2.4.46, Elasticsearch 7.13.2. Chrome Version 91.0.4472.124 (Official Build) (64-bit). 

I've followed the instructions from https://support.sugarcrm.com/Documentation/Sugar_Developer/Sugar_Developer_Guide_10.3/Integration/Migration/Migrating_From_Sugar_Cloud_to_On-Site/  and when I try to access the install I get the 'Loading...' box and an error in the console "Failed to load resource: the server responded with a status of 404 (Not Found) at <backupSugar>/rest/v11_12/metadata/public?type_filter=&platform=base&module_dependencies=1  

I've cleared the browser cache and the Sugar cache folder and reloaded. Does anyone have any idea how to fix this?