Error installing cc2531

I started the installation.
after giving the command “npm start” i got error messages.
What did i do wrong?

Paul

zigbee2mqtt@1.14.3 start /opt/zigbee2mqtt
node index.js

Zigbee2MQTT:info 2020-08-14 16:33:05: Logging to console and directory: ‘/opt/zigbee2mqtt/data/log/2020-08-14.16-33-05’ filename: log.txt
Zigbee2MQTT:info 2020-08-14 16:33:06: Starting Zigbee2MQTT version 1.14.3 (commit #1213fd6)
Zigbee2MQTT:info 2020-08-14 16:33:06: Starting zigbee-herdsman…
Zigbee2MQTT:error 2020-08-14 16:33:27: Error while starting zigbee-herdsman
Zigbee2MQTT:error 2020-08-14 16:33:27: Failed to start zigbee
Zigbee2MQTT:error 2020-08-14 16:33:27: Exiting…
Zigbee2MQTT:error 2020-08-14 16:33:27: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
at ZStackAdapter. (/opt/zigbee2mqtt/node_modules/zigbee-herdsman/dist/adapter/z-stack/adapter/zStackAdapter.js:87:31)
at Generator.throw ()
at rejected (/opt/zigbee2mqtt/node_modules/zigbee-herdsman/dist/adapter/z-stack/adapter/zStackAdapter.js:25:65)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! zigbee2mqtt@1.14.3 start: node index.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the zigbee2mqtt@1.14.3 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/pi/.npm/_logs/2020-08-14T14_33_27_383Z-debug.log

You flashed it with the zigbee2mqtt firmware?

i ordered it flashed
can i somehow check it?

Not really. There are a bunch of firmwares out there, some work, some don’t, even though you can flash it.
Re-flash it, either with a debugger or with a RPi.