The "CredSSP encryption Oracle remediation" error occurs when an insecure RDP connection is blocked by an Encryption Oracle Remidiation policy setting on the client. This setting determines how to create an RDP session using CredSSP and whether an insecure RDP is allowed. 

How to fix the "CredSSP encryption Oracle remediation" error on Windows


You can use the Local Group Policy Editor to change how the CredSSP version is checked:
- Run: gpedit.msc
- Find: Encryption Oracle Remediation
(Location: Local Computer Policy > Computer Configuration > Administrative Templates > System > Credentials Delegation: Encryption Oracle Remediation)




- Final step: Change "Protection Level" to "Vulnerable". And click "OK" to apply change.


Note: Those steps don't need to reboot your computer.




Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters