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/fef4c67958fe5e2f0bb31053b5ebca78a85fce2d/mkespfsimage/Makefile
You should set ROOT_URL correctly, otherwise the web may not work correctly.