Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/7f8c870ae4459d90b60248b7a1e9d94c406c9fb4/third-party/ArduinoJson/examples/JsonGeneratorExample
You should set ROOT_URL correctly, otherwise the web may not work correctly.