Project Server Sync: Cannot save the submit request to Project Server. Check the following likely causes to correct the problem: ...

Project Server Sync: Cannot save the submit request to Project Server. Check the following likely causes to correct the problem:

1) User does not have permission to log on to Project Server.
2) User is not a member of the Project Resources pool for the enterprise project.
3) Enterprise project, task or assignment linked to this work item is invalid.