Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/esp-link/src/commit/b2e8023089efadc731f0d765148f1cca5c07d5d4/user
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Benjamin Runnels