Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/ec25987758ceb45bbb81bbd999fe6d8342420b44/third-party/ArduinoJson/extras/scripts You should set ROOT_URL correctly, otherwise the web may not work correctly.