Can I send a group in another group

For example, sometimes, I might use 2 kicks and send them to a group )where can be applied some compression. Than I want this kick group to be sent to teh drums group.

Is it possible? and how to do it?

Actually is pretty easy . Not sure why I could not do it.

The problem I’m facing now is that I have two outputs that exclude each other. How this might be happening???

You should be able to do it. Make sure there are no sends (into FX or group tracks) active in the target groups, trying to send somewhere into the feeding channels.