Your ROOT_URL in app.ini is https://gitea.jennalody.de/ but you are visiting https://gitea.jenslody.de/jenna/gnome-shell-extension-openweather/commit/c1d6fbb409fcda32698d76baf51ac45c3ddb6702?style=unified&whitespace=show-all
You should set ROOT_URL correctly, otherwise the web may not work correctly.