Same problem. Firefox and Safari.
DNS lookup failed on host u’ovpn.sonic.net’: [Errno 8] nodename nor servname provided, or not known
Emailed Support; the reply is:
Unfortunately, the information you are looking for is unsupported by Sonic's technical support department. We recommend going to https://forums.sonic.net/
and searching for your problem in case other users have been experiencing a similar issue. Otherwise, post a new topic with as much detail as you can, and a member of our Network Operations team will review the situation.