Attached media in forum / media channels aren't recognised

I don't get the error message on forum posts. Media posts get the same error as shown above. CR: Stable Desktop 2026.1006.171735, Web 2026.1007.140750, Linux 7.2.5-200.fc44.x86_64 (x64), Electron 44.4.1, Chrome 152.0.7977.78, Node 24.21.0, Locale en-US