Hello.
what's is the password of the sql server Express that Sage CRM 2020R2 installs for you.
Thanks.
check this out- https://help.sagecrm.com/on_premise/en/2020R2/Administration/Content/InstallUpgrade/IT_FirstInstall.htm?Highlight=SQL%20EXpress
It should be SageCRM#20xx
if it does not work then Could possibly need to log into SQL Express using Windows Authentication and change the sa password
*Community Hub is the new name for Sage City