Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/FixedPointsArduino/src/commit/e5103ac2eb2da980609632ec8429c19bbf8faa31/examples/FixedPointCalculations
You should set ROOT_URL correctly, otherwise the web may not work correctly.