Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/5de7b39670c17718b875c422f9879cd81e5b09a5/third-party/TeensyVariablePlayback/examples/array
You should set ROOT_URL correctly, otherwise the web may not work correctly.