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/5b7e1a9d8ddf1224c5671f9ff243e7d9a07b7fdd/mqtt You should set ROOT_URL correctly, otherwise the web may not work correctly.

Alastair D'Silva acc7c90575 Merge branch 'master' into rs485		8 years ago
..
mqtt.c	Merge branch 'master' into rs485	8 years ago
mqtt.h	fix mqtt for new slip protocol	9 years ago
mqtt_cmd.c	block MQTT during avrflash, fixes #179 An error occurred	8 years ago
mqtt_cmd.h	block MQTT during avrflash, fixes #179 An error occurred	8 years ago
mqtt_msg.c	massive rework of MQTT	10 years ago
mqtt_msg.h	Merge branch 'master' into windows	10 years ago
pktbuf.c	Fix for services page syslog filter select list	9 years ago
pktbuf.h	lots of ifdef	10 years ago