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/de9b4dbe6da6cfa25c68b3d1d3007539f5c51d19/serial You should set ROOT_URL correctly, otherwise the web may not work correctly.

Thorsten von Eicken d679340035 added no-cache headers; shrunk favicon; minimal support for static ip & hostname		10 years ago
..
console.c	added no-cache headers; shrunk favicon; minimal support for static ip & hostname	10 years ago
console.h	added reset button and baud rate switching	10 years ago
serbridge.c	license update	10 years ago
serbridge.h	support for dynamically changing gpio pin assignments	10 years ago
serled.c	license update	10 years ago
serled.h	support for dynamically changing gpio pin assignments	10 years ago
uart.c	license update	10 years ago
uart.h	added reset button and baud rate switching	10 years ago