Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/03785d5d8c80e4b845b1237e3b99ed8c1f8a0a07/third-party/TeensyTimerTool/examples/01_Basic/ArrayOfTimers
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Measured output of the example sketch
![Output](/wirtz/MicroDexed/media/commit/03785d5d8c80e4b845b1237e3b99ed8c1f8a0a07/third-party/TeensyTimerTool/examples/assets/FTM0_8CH.jpg)