Error message when switch turn on / off

Configuration
1

I Have an home automation system from PeHa (PHC) with a 942 STM-AN control module. The lamps are switched via the control module or by pushing buttons. It is also possible to switch the lamps via HTTP command.
In HA I created a switch
image

The code in configuration.yaml:

- platform: command_line
  switches:
     light_ledspots:
     command_on: curl "http://192.xxx.xxx.xx:80/postEvent.html?action=input&STM=0&MOD=2&CHA=0&EVT=2"
     command_off: curl "http://192.xxx.xxx.xx:80/postEvent.html?action=input&STM=0&MOD=2&CHA=4&EVT=2"

When I turn on the switch the light goes on, but the status will not change to “on” (color lightbulb from blue to yellow) .
In the dev-info an error will show up.

Command failed: curl "http://192.xxx.xxx.xx:80/postEvent.html?action=input&STM=0&MOD=2&CHA=0&EVT=2"

Does anybody have an suggestion on how I can fix this problem?

Thanks in advance
kind regards
oudnm