mphan When I switched over to PHP 8 Acymailing 5.11.3 did not work when I try to create to edit a newsletter. It displayed a blank page with menus to left and the top menu on the bottom right all rearranged in a weird way.
jvstratum Hi, Can you check if you see any (javaascript) errors in your console (F12 in Chrome/Firefox)?
mihha Hi, Please raise a support ticket for this (https://www.acymailing.com/support) so we can further assist you.