Unable to open a project on our internal server

Hi pals !
I’m encountering an issue where i work, they got an internal server where we share our files, we got our perforce system up and running but we are unable to open project file above 5.0.1 version.

5.0.1 are ok and run smoothely but above we have the “Failed to open descriptor file” error
Can someone help me out ?

Thanks a lot !