Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenTheremin_V3_with_MIDI/find/commit/ec7bc87c0d72cb34785430435a5f0bf9f5d3568e You should set ROOT_URL correctly, otherwise the web may not work correctly.