Yes, that's a server issue. contact your hosting company and ask them to enable 'symlink' and any other disabled functions listed in your system check.
They way we use it is we get an email alert when users who signup start posting links. Then we determine if that link is spam or not. and if it is we delete their account, block their ip and remove anything they've posted.
That's a big jump. Send us your admin login details to support at jamroom dot net along with a link to this thread and I'll login and see if I can see whats up.
I also see the same issue. I AM able to PUT to update anything in the USER table, but not able to PUT to update anything via the bridge module.
I believe the cause of it is the user's id info is not getting stored in the session data, but will need brian to take a look at what I think i've found.