RDP with VPN connection: User account did not work

I am in a network using a VPN.
I want to connect a Windows 11 computer in this network using RDP.
When I try to connect to this computer using the RDP app for MacBooks it doesn’t work.
Before connecting to the VPN I made a new firewall rule to allow ICMPv4, that’s needed cause otherwise I cannot ping the other computer.

Now I have problems using RDP since I cannot connect to the computer. I have the hostname, user account, and password, but it says that the account did not work.

Any suggestions?