Problems with connecting Denon AVR Receiver to Homey pro

Hope someone can help me. Should connect a Denon AVR X2200W Reciver to Homey Pro, but get an error message. “ERROR: CALLBACK IS NOT A FUNCTION” when I try to add/search for the device.
Anyone know what’s wrong?

That’s a programming error, you should contact the developer of the app about it.

Thanks for reply. Then you mean the one who made the APP in Homey? How to send a message to them?

Which app are you using?

Bruker Denon

I can’t find that app in the Homey app store.

Sorry, Denon AVR is the full name of the app in the Homey app store