This is a new one for me: I’ve updated a Kirby instance on a server from 3.6 to 3.7, replaced the webp plugin with Kirby’s native webp conversion, upgraded everything to PHP 8.1 and set the server to PHP 8.1 FPM.
Now I’m getting this error on trying to upload an image in the panel. I can’t really tell which of those steps made this happen. I don’t find a dependency like that in the composer.lock file. I already removed the panel to let it update. Bit lost here, but also can’t think of this being a big issue. I just don’t know whether this is a server issue or an issue of my Kirby instance.