I am trying to set up and existing CraftCMS 3 installation on a Ubuntu 22.04 machine with PHP8.1. The deprecation errors I can fix, no problem. DB imported, it's accessible, no biggie. All pages load so far, all good. With the exception of the dashboard (login works as expected). When I call mydomain.com/admin/dashboard, (in development mode) I get a
Now, I've taken a look into the templates/ folder. There never was a default template, only my custom ones. I created a dashboard.twig, but no change. The site is usable, but not configurable.
Any ideas or pointers?