I can not paginate after filtering

Thankyou for your help. I still can’t fix the problem.
I have my project in a repository in bitbucket, I can give you access. I really appreciate any help.

I know now what the problem is and there are two solutions:

  1. Quick and easy

Change the form method from POST to GET and also where you check for a POST request in the controller

  1. A bit more effort

Keep the POST request, but perpetuate the POST data in a session cookie

The first one worked !
Thankyou for everything, now it works as intended