У вашего броузера проблема в совместимости с HTML5
How to setup the multiplayer addon for invector.
Follow updates to this package on the invector forum: http://invector.proboards.com/thread/1908/free-deprecated-photon-multiplayer-scripts
Here is the location of this package: https://github.com/wesleywh/InvectorPhotonPUNMultiplayerAddon
00:45 - PUN 2 Import/Setup
04:19 - Addon Import
05:52 - Addon Setup/Player Setup
07:07 - Resource Creation/Debugging
08:40 - Convert Scene Option
10:31 - Demo
12:10 - Current State, Plans
13:13 - Network Manager (Spawn Points)