Problem after changing hosting server

Hi !

I changed my website from a zpanel hosting to a virtualmin. This plugin was working correctly before.

Now, everything seems stable but, if i press the button “TEST CACHE”, it returns after a while a 500 internal server error.

What PHP config do i need exactly in order to this plugin to work at 100% like it was before?

I know this is a server config problem, but could you give me a direction where to look at ?

thanks

https://wordpress.org/plugins/wp-super-cache/