Zigbee2mqtt crashed after start

Hello together
I need your support. I am disillusioned.

Some time ago, my system was still running without problems. But suddenly it only causes problems.

At the start zigbee2MQTT crashed.

Zigbee2MQTT:info 2021-09-28 07:30:03: Logging to console and directory: ‘/opt/zigbee2mqtt/data/log/2021-09-28.07-30-02’ filename: log.txt
Zigbee2MQTT:info 2021-09-28 07:30:04: Starting Zigbee2MQTT version 1.21.1 (commit #4a51e0c0)
Zigbee2MQTT:info 2021-09-28 07:30:04: Starting zigbee-herdsman (0.13.138)
Zigbee2MQTT:error 2021-09-28 07:30:24: Error while starting zigbee-herdsman
Zigbee2MQTT:error 2021-09-28 07:30:24: Failed to start zigbee
Zigbee2MQTT:error 2021-09-28 07:30:24: Check Frequently asked questions | zigbee2mqtt.io for possible solutions
Zigbee2MQTT:error 2021-09-28 07:30:24: Exiting…
Zigbee2MQTT:error 2021-09-28 07:30:24: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
at ZStackAdapter.start (/opt/zigbee2mqtt/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:102:27)
at Controller.start (/opt/zigbee2mqtt/node_modules/zigbee-herdsman/src/controller/controller.ts:123:29)
at Zigbee.start (/opt/zigbee2mqtt/lib/zigbee.js:66:27)
at Controller.start (/opt/zigbee2mqtt/lib/controller.js:110:27)
at start (/opt/zigbee2mqtt/index.js:95:5)
npm ERR! errno 1
npm ERR! zigbee2mqtt@1.21.1 start: node index.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the zigbee2mqtt@1.21.1 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/openhabian/.npm/_logs/2021-09-28T05_30_24_553Z-debug.log

Can someone help me?

Did you do this? What was the result?

This looks like the main culprit. Have permissions changed? Plugged something new into the machine?

Note that this forum is for openHAB so you might get better support through official zigbee2mqtt channels.

If you do have something else like Zwave unplug it. And disable the addon. And try again.

more information please
what was the version of openHAB that was running? Hardware platform and host operating system might also be useful