Hi.
I had similar problem with Windows 8.1, error#3219.
Try running your player with admin rights. Right click on the signageplayer.exe and click "Run as administrator".
I just updated one W8.1 PC with signage player 4.34.14 to version 4.34.20, all seems ok.
I noticed that the updates worked just fine with Windows 7 Ultimate PCs.
I tried to change W8.1 program settings so the programs could run with admin rights. Problem was that Windows startup did not load the signage player like it should.
Google:
Windows 7: Elevated Program Shortcut without UAC Prompt
User Account Control (UAC) - Change Settings in Windows 8