The WinRM client cannot process the request. It cannot determine the content type of the HTTP response from the destination computer after CU10 Upgrade

Cannot Access Exchange 2016 Exchange Powershell after CU Update. Users Outlook cannot connect, OWA and ECP cannot connect either.

I issued the command Get-ExchangeServer | Format-List Name, Edition, AdminDisplayVersion to verify the current Exchange CU version which is CU3 15.1.544.27 and wanted to update to CU10.

I use the Admin Power Shell to do the update, however, when I ran the following command, d:>setup /m:upgrade /IAcceptExchangeServerLicenseTerms

For some reason, it was indicating that i was upgrading CU 3 and not CU 10, so i let it install successfully and thats where the problems started when I tried to connect to the Exchange Admin Powershell.

Users cannot access mailboxes, OWA doesn't work and ECP doesnt work. I tried to access the Exchange Admin Powershell with another account and same issues.

VERBOSE: Connecting to FQDN.
New-PSSession : [FQDN] Connecting to remote server FQDN failed with the following
error message : The WinRM client cannot process the request. It cannot determine the content type of the HTTP response
from the destination computer. The content type is absent or invalid. For more information, see the
about_Remote_Troubleshooting Help topic.
At line:1 char:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
   gTransportException
    + FullyQualifiedErrorId : -2144108297,PSSessionOpenFailed