STRATO: How to fix Error 500 despite stable system?

Unfortunately, errors do not always necessarily arise from the WordPress system itself, a not easy solution is when the server causes a problem.

The hoster Strato offers for its PHP selection, for example, a kind of boost function. When enabled, this can lead to an occasional Error 500 message when trying to edit a page or post. If you deactivate this function within your hosting package, the page runs error-free again.