Hi,
Many thanks for your reply, and apologies for this late response.
I've obtained the log following a couple of sign in and sign up attempts last week, and have attached that to this email. The log times appear to be an hour out, suggesting it's using a different timezone - the server's timezone appears to be correct though; is there somewhere that BBB or Greenlight set the timezone independently of the server? Not sure if it could partly be to blame for the auth issues...
I'll see if we can get it upgraded in the meantime.
Many thanks,
Paul