What to do, when facing the metadata deployment errors of:

• Page Layout: Invalid field:TASK.SUBJECT in related list:RelatedActivityList
• Page Layout: Invalid field:NAME in related list:RelatedEmailMessagePeopleList
• Permission Set: Unknown user permission: EditEvent
• Permission Set: Unknown user permission: EditTask
• Activity Custom Object: searchResultsFields TASK.SUBJECT not found

I faced these errors for my CI/CD deployment user, which I had changed Profile = Minimum Access - API Only Integrations and User License = Salesforce Integration

I found that the user was missing the System Permission = Access Activities, and when granting this via a permission set, then the errors were resolved. 

I hope others can use this finding in the future, because the errors were not really documented anywhere. 

#Deployment Error  #Metadata