Any updates on this ? I have a similar issue. I can't preview, trying both over LAN and localhost.
Port kept at 50000, opened up in firewall and router (even tried with disabled firewall). I'm running as administrator and tried in Firefox and Chrome (both latest). R114 64-bit.
Win 7 Ultimate 64-bit SP1
Intel i7 2.67GHz, 18GB RAM
The error codes I get are 1232 and 1214 though.
I've tried with WAMP on and off, but could WAMP be causing a conflict in the first place ? I currently export as HTML and then use WAMP to serve it as localhost and can test then. Not sure if I can test on other devices though, or do I need to upload it to dropbox then ?
I do know I can't seem to setup a home group, so maybe there's an issue there (I'm a tech noob).