Internal Server Error IONOS

What i tried:

  • Installing matomo 4.13.5 (which works good on another Website from us at a different hoster) → same Problem
  • Deactivating the IONOS Cache → Seems to kinda work but wordpress gets really really slow and some links don`t seem to work anymore
  • added max_input_time = 600 / max_execution_time = 600 to php.ini → no changes

Interesting Links:

Interesting:
If I click refresh in my browser for 5 to 10 times the website gets displayed correctly without an error. Matomo seems to make my wordpress really slow. Maybe something runs into a timeout or it’s a caching thing?

atm Im wating on a call from IONOS to get the error log.