Having the same issue here. After ~30sec, dialog box pops up saying that the Boot Window cannot complete its version check, and fails to reach the launcher screen.

Tried restarting the computer and restarting the computer in safe networking mode (as per advice from past issues of this type), no luck there. I have been checking server status/maintenance (another reason for this error in the past) - everything on those fronts seems to be in order.

Thank you for any insights!