Merge Requester not working on 8125

Merge Requester not working on 8125

Hi, before upgrading to 8125 I was merging requester with the system.
See attached file, I've readded all the file from the ZIP to the good location on the server, rebooted the server and it's not working.

When a go to the link: https://............../servlet/DebugServlet?mode=username or https://............../servlet/DebugServlet, The system bring me to the login page.... same as usual but after entering my credential I have a blank page

Thanks to help
Frikdel