did you get any update on this from stardock? I just started having exact same issue today. My secondary works perfect until i fire up WoW on it and my tray icon immediately goes gray on primary computer. then it randomly goes in an out but is completely unusable. Ive used this setup for years and have never seen this issue before. I tried rebuilding network connections, resetting hub, rebooting, and none have worked.
both running "Stardock Multiplicity Pro 1.21". downloaded and updated Today.
Having similar issue, see: https://forums.stardock.com/?forumid=267&aid=172144#1424315
I am having the same exact problem. Here is the email I sent to stardock support describing my issue: Hello, my name is Dominic. I own Multiplicity Pro 1.2.1 and am registered under ***@****.com. I have been using MP for years and just recently ran into issues. For some reason MP keeps getting error bubble from system tray saying that connection to my laptop has been lost due to a protocol error. I upgraded from 1.2 pro to 1.2.1 pro paying $49.99 in hopes of resolving my issue but