Error Activating Synergy

[Michael Lancaster 0]

Started up my laptop this morning, connected to the PC running synergy as a server fine but noticed that the client had switched from Synergy Pro (i.e. registered) to Synergy (UNREGISTERED). So ran the set up again and when trying to activate the pro version, at the point when i'm entering my username and password, I get the error: "An error has occured while trying to sign in..... Code:1 Error: FATAL: An error occurred: Unknown error, code 12057" Tried restarting the laptop but same issue