Problems linking a wall switch

I use a hue bridge and attached a wall switch wich works fine with the hue app. In Paper UI I find this wall switch as a thing. It is online and this thing have a channel (SwitchItem).
When I try to link this channel, there is an error. The log says:
[rest.core.internal.item.ItemResource] - Received HTTP PUT request at ‘items/KellerFlur_Schalter’ with an invalid item type ‘SwitchItem’.
Do some body have an idea, what is wrong?
Thanks in advance.

Are you using an old build? This has been fixed a while ago:

I use the latest stable version 2.2.