askvortsov michielbrinkers What version of s9e/text-formatter do you have installed? composer show s9e/text-formatter or possibly its describe instead of show.
askvortsov michielbrinkers Could you try downgrading to v2.8.3? 2.8.4 is a recent release, it's possible there's a bug crept in.
askvortsov michielbrinkers https://discuss.flarum.org/d/23653-templateloader-500-error seems to be the same error, it seems like updating PHP to 7.4.5 fixed it in that case. You could also try updating libxml2.
michielbrinkers askvortsov I'm currently on 7.4.3, which seems to be the highest apt-get wants to go right now. I could try upgrading manually to 7.4.5, but it feels like kind of a minor step. I'm wondering if I have all the extensions installed I need. If any were missing, would I always get an error?
askvortsov michielbrinkers I believe that it extensions were missing, composer would throw a fit, or there'd be a more explicit error. Based on what JoshyPHP said in the linked thread, I think it's possible that the error isn't even with the php version, but with how it's compiled and linked to the libxml2 library, so changes to either (or possibly even reinstalling php) might help?
michielbrinkers My libxml is at the latest stable version (2.9.10) But yeah, I might just go ahead and reinstall php, and try to do a better job at installing all the extensions, because that happened a bit ad hoc yesterday. Thanks for the help so far 🙂
askvortsov michielbrinkers These kind of errors are an absolute pain, I'm still unsure why they occur for some environments but not others. Glad to do what I can to help!
michielbrinkers askvortsov Took me a while to get to it, but after a fresh install of apache/php/mysql I got it working. Thanks for the help 🙂