Zwave FGD212 can't set associations

Hello all,
I’m trying to set association from my Fibaro dimmer2 to another fibaro switch. I want to use the second input from the dimmer, so if I understand correctly I should set channel 4 to the desired node and endpoint (in my case: Node 18 endpoint 1). I tried setting the association but it fails with a server error. Then I thought it might be because the switch I wan’t to control isn’t a gen5, so i tried setting parameter 27 to all channels unsecure. That also gave a error.

10:26:24.375 [ERROR] [] - Exception during HTTP PUT request for update config at 'things/zwave:device:57bdb92d:node5/config' for thing 'zwave:device:57bdb92d:node5': null
I’m running the latest stable release with the latest release from the zwave addon.
Any help would be apreciated.