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/c92f9400f227a4d753c7b5f2e5b15b08cf48f57b/user You should set ROOT_URL correctly, otherwise the web may not work correctly.

Jeroen Domburg 98304bc9e5 Fixing espfs upload capability		10 years ago
..
cgi.c	Using one header file for esp8266 stuff	10 years ago
cgi.h	Moved the flash cgis out into their own file and made the uploadEspfs cgi work properly	10 years ago
io.c	Reverting accidentally commited disabling of GPIO0 low reset	10 years ago
io.h	Added include guards and removed unused includes	10 years ago
stdout.c	Big-arse structure change: readying esphttpd for a split into a library and an usage example	10 years ago
stdout.h	Added include guards and removed unused includes	10 years ago
user_main.c	Fixing espfs upload capability	10 years ago