This is a proprietary protocol developed by Microsoft that allows users to connect to another computer over a network connection. The protocol provides remote access to a graphical user interface for the client.
A specific Windows update, KB5055528 , has been widely reported by users as a primary trigger for this error. rdp 0x3 0x11
Error 0x3 translates to ERROR_PATH_NOT_FOUND . In RDP, this usually means your client cannot locate the remote computer on the network. It’s a , not a credential problem. This is a proprietary protocol developed by Microsoft