Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/7c1b0f139c29d19d43dc040ad2c11de67d01ac2b/third-party/Bounce2/docs/files/tab_b.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.