Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/esp-link/blame/commit/21fbbf6a8af70fcf9bc659f71ca4d23b85c82c5a/espfs/mkespfsimage/Makefile
You should set ROOT_URL correctly, otherwise the web may not work correctly.