Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/ed09f8765dde69a2514d15fdd06a2567684c2690/third-party/ArduinoJson/examples/StringExample
You should set ROOT_URL correctly, otherwise the web may not work correctly.