Issue causing this: Extensions. In PHP logs I found out Symphony was mentioned along with Flexmailer. We had alpha outdated version of Flexmailer causing issues. Disabling it/ updating it seems to work as solution. After that I could update CiviCRM smoothly and works! Hopefully someone will need this in the future!


You can set preference by going to Administer > System Settings > Misc (Undelete, PDF,.......)


I was setting this up in a staging environment which is not up to date with the latest versions of CiviCRM. If you go are running a version of CiviCRM earlier than 5.24 then you need to apply this patch which solves the problem. The issue is not seen in versions of CiviCRM 5.25 and later. (https://patch-diff.githubusercontent.com/raw/civicrm/org.civicrm....


Scheduled reminders should provide you the required functionality. Administer -> Communications -> Schedule Reminder You should be able to set up the required reminders from there. Hopefully it's pretty self explanatory - however there is more information here: https://docs.civicrm.org/user/en/latest/email/scheduled-reminders/#using-scheduled-reminders-...

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