Hi, I tried the RC1 and now RC3 and it is still no luck from me 
. It does not connect the account to the RVT connector, see post here: Revit Connector 2.16RC unable to connect to accounts or streams - Help - Speckle Community
I tried removing the connector and installing back in, tried removing account and log back.
Please let me know if you believe it could be something from my end I could try.
Thanks,