Temporary workaround, use command parameters:
mstsc/v:< Server [: Port]>/admin
(eg: mstsc/v:192.168.1.1/admin)
Can be connected to enter.
After entering, you can check the server log, check the problem, and further resolve.
Attached: Remote Desktop Connection usage
MSTSC [< connection file;] [/v:< server [: Port]>] [/admin] [/f[ullscreen]] [/w:< width >/h:< height;] [/public] | [/span] [/multimon] [/edit "Connection file"] [/restrictedadmin] [/prompt] [/shadow:<sessionid> [/control] [/noconsentprompt]
"Connection File"--Specifies the connection. The name of the RDP file.
/v:< Server [: Port]>--Specifies the remote computer to which you want to connect.
/admin--Connect you to the session to manage the server.
/F-Launches Remote Desktop in full-screen mode.
/w:< Width >--Specifies the width of the Remote Desktop window.
/h:< Height >--Specifies the height of the Remote Desktop window.
/public--run Remote Desktop in public mode.
/span--match the width and height of the remote Desktop to the local virtual desktop and, if necessary, extend across multiple monitors. To scale across multiple monitors, you must arrange the monitor into a rectangle.
/multimon-Configures the Remote Desktop Services session monitor layout to be the same as the current client configuration.
/edit--Opens the specified. RDP connection file for editing.
/restrictedadmin--connect you to a remote computer or server in restricted management mode. In this mode, credentials will not be sent to the remote computer or server, and if the computer you are connected to has been compromised, doing so can provide you with protection. However, connections made from remote computers may not be authenticated by other remote computers and servers, which can affect the functionality and compatibility of the app. Represents/admin.
/prompt--Prompts you to enter credentials when you connect to a remote computer or server.
/shadow:<sessionid>--Specify the SessionID you want to see.
/control--allows control of the session.
/noconsentprompt--Allows hiding without user consent.
The remote session was interrupted because no license was available for the Remote Desktop license server.