Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/esp-link/src/commit/9920fd500e51588554ce2e435f94c38f904bf91e/include You should set ROOT_URL correctly, otherwise the web may not work correctly.

Thorsten von Eicken adb0706349 added built-in AVR/optiboot programmer		9 years ago
..
esp8266.h	Made some modules optional	10 years ago
espmissingincludes.h	added built-in AVR/optiboot programmer	9 years ago
uart_hw.h	rename to esp-link; add serial bridge code; remove jpgs	10 years ago
user_config.h	Missing define	10 years ago