Update to PHP 7.4 and I lost menus

I used my Cpanel access for FastComent and updated to 7.4 as requested by my site dashboard. I then lost all menus. The PHP update is through a dropdown within CPanel. I then went back to the default and the buttons will still not work. I am using S2Member Pro and am using the latest version.

Nothing to do with s2member… Only php 8 is still broken with S2 member pro. Without pro PHP 8 is fine

I meet no problem with php 7.4+. As it’s quite a common php configuration, if were will be a problem, I think there will be much more messages about this.