SDK command error - "The input is not a valid Base-64 string..."

Whenever I perform ANY SDK command (i.e. get-Mguser, invoke-MgGraphrequest), I receive the following error.

Example 1:

Get-MgUser : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

At line:2 char:1

+ Get-MgUser -Filter "userPrincipalName eq '$UPN'"

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : NotSpecified: (:) [Get-MgUser_List1], FormatException

+ FullyQualifiedErrorId : Microsoft.Graph.PowerShell.Cmdlets.GetMgUser_List1

Example2:

Invoke-MgGraphRequest : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
At line:4 char:14
+ ... response = (Invoke-MgGraphRequest -Uri $uri -Headers $headers -Method ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Invoke-MgGraphRequest], FormatException
+ FullyQualifiedErrorId : NotSpecified,Microsoft.Graph.PowerShell.Authentication.Cmdlets.InvokeMgGraphRequest

I am able to perform connect-mggraph and obtain the -scopes needed.  

I have done the following (and searched for the past few days):

Executed VSCode/Poweshell ISE/pwsh.exe with Administrator privs

Removed microsoft.graph modules and reinstalled version 1.10

I do not recall when this error began, but it's probably within the past week. I'm using Graph Explorer without error of course. I've had 2 Windows 10 updates on 6/20/2022. KB5014699 and Servicing Stack 10.0.19401.1737.

I realize "It works on my machine. What did you do to yours" is the most common answer. 🙂

Any guidance, workaround, solutions to try would be most welcome.