The 1st error (unauthenticated) is a known issue, try stopping/starting your PowerShell/PowerCLI session.
There is also a tag () that is not found, it might be the case in the name.
In your vCenter it shows Dev-4-Week-Windows, not DEV-4-Week-Windows
Blog: lucd.info Twitter: @LucD22 Co-author PowerCLI Reference