Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/d8ddd78daef445ed2d7efa22e5cf16ccfc2458fb/third-party/ArduinoJson/extras/tests/TextFormatter You should set ROOT_URL correctly, otherwise the web may not work correctly.