I had the same issue. It was a wrong version supplied with the install.
There is KB out there. I downloaded it but did not test it yet. The wintech 5.2 plugin is in the kb article, you may need to be logged into support to get it.
ERROR: Error code: 0xe0050004, The wrong version of the SafeBoot Client is currently active
Similar thing. SBWintech executable is marked as 22.214.171.124, but when you run it, in Help/About is 126.96.36.199. So why they are different?
Any update on the correct plugin for 5.2.x? I have some computers with 5.2.3 installed and we need an updated version of WinTech.
I downloaded the plugin from the knowledgebase article, https://kc.mcafee.com/corporate/index?page=content&id=KB66802, listed as 188.8.131.52, but in Help/About it is listed as 5.1.7.