Microsoft announced "The recent (1/8/2019) Windows security patch CVE-2019-0543, has introduced a breaking change for a PowerShell remoting scenario. It is a narrowly scoped scenario that should have low impact for most users.
https://blogs.msdn.microsoft.com/powershell/2019/01/10/windows-security-change-affecting-powershell/
This should have very limited impact, but if you are impacted please share!