When remoting to a PC you get the following similar error:

An Authentication error has occurred.
The function requested is not supported.
Remote computer: <servername>
This could be due to CredSSP encryption oracle remediation

To fix this I had to add the following registry key on the client machine:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters] “AllowEncryptionOracle”=dword:00000002

I did have to create the key CredSSP and Parameters.  Then create 32bit Dword vaule AllowEncryptionOracle

Reference: https://www.experts-exchange.com/questions/29098796/CredSSP-encryption-oracle-remediation.html