Backup Manager Issue

[EdizK]

I have recently upgraded from version 10.1 to 10.2. When I try to use Backup Manager I get 500 - Internal Server Error. I was able to see the Backup Manager page immediately after the upgrade but I can't anymore.

could you please provide a solution for this and or tell me how to backup using another method if there is any.

 

[EdizK]

Update: Users can backup their domains with no problem but when I try to access the manager through admin account I just get the mentioned error message. I think it may be a file system permissions issue. Any suggestions?