Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/7f136b1e7275d3bba4d7c599ef7b044fc8195d77/third-party/ArduinoJson/extras/scripts/wandbox You should set ROOT_URL correctly, otherwise the web may not work correctly.