Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/Teensy-reSID/src/commit/a2201d8b6ea0b5152d4da13c51f3b0c5e6ea799a/examples/SDCARD/Krakout1.dmp
You should set ROOT_URL correctly, otherwise the web may not work correctly.