Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/0721cbc3b7ba70ac2e51b1775bcbfd8fb8574f13/third-party/Bounce2/examples/bounce_multiple
You should set ROOT_URL correctly, otherwise the web may not work correctly.