Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/cc5c5b16f27abcacd6c661991eb64017c4331384/addon/SD/22/ePian-22.syx
You should set ROOT_URL correctly, otherwise the web may not work correctly.