Battery doorbell T8210 fails to connect to homebase 2

I’ve had this doorbell for more than one year and it has been working fine. For other reasons I just reinstalled homebase 2, battery CAM’s and the doorbell. For some reason it will not pair with homebase 2.

I’ve treid resetting the doorbell (10s) several time, changed mode on homebase 2 from Beta til standard. Distance when pairing is less than 1 meter. LED’s flashing blue etc. Nothing seem to work.

Any suggestions to how I make the two pair?