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/e39ee808c960666fc2e7fd1aac8afa88268f74f2/serial You should set ROOT_URL correctly, otherwise the web may not work correctly.

Benjamin Runnels e39ee808c9 DOH! missing semicolon		9 years ago
..
console.c	Added sending text to console from web interface.	9 years ago
console.h	Added sending text to console from web interface.	9 years ago
crc16.c	incorporated tuanpmt's slip protocol and rest library	10 years ago
crc16.h	incorporated tuanpmt's slip protocol and rest library	10 years ago
serbridge.c	extend reset for esp8266	9 years ago
serbridge.h	added built-in AVR/optiboot programmer	9 years ago
serled.c	added built-in AVR/optiboot programmer	9 years ago
serled.h	massive rework of MQTT	10 years ago
slip.c	DOH! missing semicolon	9 years ago
slip.h	server-side handling of MQTT web page	10 years ago
uart.c	refactor pin config, add support for rx pull-up	9 years ago
uart.h	added built-in AVR/optiboot programmer	9 years ago