Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/FixedPointsArduino/src/commit/21a2b8bd19bb6faca56c8d3e75df5ef78ffcc357/examples/FixedPointCalculations
You should set ROOT_URL correctly, otherwise the web may not work correctly.