Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/72465802451ee1f8f651d423ab7cbdb3a9f3e572/third-party/ArduinoJson/extras/tests/Cpp11 You should set ROOT_URL correctly, otherwise the web may not work correctly.