I have your system and all functions . I added garage door opener and it is synced properly when I send a signal to open and close it flashes and states opening or closing. But nothing happens. There are. 4 connections on my garage door opener I am not sure which 2 are the connections that are correct .
From your question, it sounds like you’re using the former. Can you please provide the model of your garage door opener? Also, I’ve attached a compatibility chart. Please take a look at that and to make sure your garage door opener is compatible.