Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenAudio_ArduinoLibrary/src/branch/master/examples/ReceiverPart1/Rcvr1Outputs.gnumeric You should set ROOT_URL correctly, otherwise the web may not work correctly.
 
 
OpenAudio_ArduinoLibrary/examples/ReceiverPart1/Rcvr1Outputs.gnumeric