Recently, we received several similar issue posts.
Please first try below steps to see if they help.
- On the windows PC, disable Network Level Authentication
- Enable Local group policy Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Security\Require use of specific security layer for remote (RDP) connection - RDP
If above not help, please kindly report the issue to the UseVoice:
If the Answer is helpful, please click "Accept Answer" and upvote it. Thanks.