Windows 10 x64 v2004 - May 2020 Update (20H1) (10.0.19041.84), Another user is signed in. If you continue, they’ll be disconnected.

[progman-vin]

The solution of the problem:
1.
https://github.com/geissbuehler/TermsrvPatcher/releases
2.
https://www.mysysadmintips.com/windows/clients/545-multiple-rdp-remote-desktop-sessions-in-windows-10

[d3dx9]

https://github.com/asmtron/rdpwrap/blob/master/binary-download.md - try this here, that works for me :)

[BuNoze]

https://github.com/asmtron/rdpwrap/blob/master/binary-download.md - try this here, that works for me :)

Thanks, worked for me too 👍

[sebaxakerhtc]

Applicable to #1004