I had a version of your experience, but it resolved magically. No idea why. I originally set up the integration, and it worked. Then I completely rebuilt HA at one point and had to redo the bridge config, and it just refused. All sorts of errors, it just refused to even see the doors. Frustrated, I chucked the device in my closet and forgot about it for a while.
Then a few months later I decided to try again and be very careful and deliberate, and ... it worked. Just like it was supposed to. Sigh. No idea what incantation I did right, but now it has been working for several years without a hitch.
I did recently buy a ratgdo (well, ordered it at least, it hasn't arrived). That's my backup plan if the Home Bridge decides to go tits up.