Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/commits/commit/81669512ad4b11bdc12d8c502c9510e85cf08e3d/third-party/TeensyTimerTool/examples/01_Basic You should set ROOT_URL correctly, otherwise the web may not work correctly.