Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/1c14c1fa33c25e97040b5f5553c2022e6b1269c4/third-party/Bounce2/docs/files/nav_h.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.