Ikea devices not working correctly? (24 October 2019)

Tnx, how to I install it?
I know I can install via web portal, but then how to I “bind” the smartapp to the device?

I’m asking because I knew that with the Classic App I can add a Smart App and then use it, but as you can see here:

The classic app crashes when I try to do it.

So is there a way I can use it?
Tnx