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/6df6376a0a11c26758bf67ddb716719dc37d753a?style=unified&whitespace=ignore-change
You should set ROOT_URL correctly, otherwise the web may not work correctly.