Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/f458bbb8c121efdd4269ef47a7e0f12faa92c1d0/third-party/ArduinoJson/extras/tests/MsgPackSerializer You should set ROOT_URL correctly, otherwise the web may not work correctly.