All Auto rights are failing when you try to add it.
For example putting a 'X' Resources as a Project Manager or an Idea manager this will not generate the auto rights.
Since that is not be able to work with permissions who gives auto rights
This is because the auto rights were locked in the prlock table, usually this happens when the system hangs and you're doing a procedure which was not finish properly.
All CA PPM Versions.
Could you please go to the following URL on your environment.
And check if the system has 'Auto Right' locks and remove it.