Your ROOT_URL in app.ini is https://gitea.jennalody.de/ but you are visiting https://gitea.jenslody.de/jenna/gnome-shell-extension-panel-osd/blame/commit/d1bc94523c9216a97a3b8f8dd0223a746a983c93/ChangeLog
You should set ROOT_URL correctly, otherwise the web may not work correctly.