I use the same certificate and username and password as my PC, but on the PC the connection is OK, and on the RB it failes.
The log says (BUT I checked the User and Password they are typed ok) :
CoId={DB37BECC-3969-419D-A0DD-B7543C889BD3}: The account for user \<USERNAME> connected on port VPN1-117 does not have Remote Access privilege. The line has been disconnected.