Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/2c6ff3220a6c9aee53b3ef3d7ee083a204d34c42/third-party/ArduinoJson/examples/JsonParserExample
You should set ROOT_URL correctly, otherwise the web may not work correctly.