Sonos Muttiroom Rule not triggering

[Mofix (Moritz Glaser)]

I tried to set up a rule to be able to controll my sonos speakers. Actually, the only reason to do that was to be able to play something on all speakers at the same time.
After finding this, I was confident that this schould work:

Sonos Multiroom rule for openHAB 3

Today I want to share my new Sonos multiroom rule that is made in the new openHAB 3 script language with great javascript support. Maybe some of you know maybe my old version of openHAB sonos multiroom but this was really ugly code. To the time where i wrote this, there was no javascript support available so I had to use the ugly lambda functions. Now on openHAB 3.0 i decided to make a new fresh version of the rule which uses the benefits of javascript. What does the rule: The rule can manage …

But if I sent a command to the triggering item nothing happens. OK, in the log I get a lot of JS errors, but I will check that separately.
My main question is now, why the configuration in the “triggers” section in the rule is removed all the time.

I set this:

triggers:

• id: “1”
  configuration:
  itemname: Sonos_Multiroom_Control
  type: core.ItemCommandTrigger

After Saving it gets replaced by:
triggers:

• id: “1”
  configuration: {}
  type: core.ItemCommandTrigger
  → so, the configuration/ triggering item is lost

Any Ideas?

[Matze0211 (Matthias)]

Make sure that indentation on the itemname is correct.

[Mofix (Moritz Glaser)]

I got it sorted out. The type of the triggering item needs to be from the type “string”