Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/b9c59a9718aac06eb242835a2ed546b16bef7b45/third-party/TeensyVariablePlayback/extras You should set ROOT_URL correctly, otherwise the web may not work correctly.