Unable to log in as administrator on winserver 2019, what could be?

Question

Windows Server

Hello!

I have a virtual machine installed on Xen under Windows server 2019

Stock installation, I installed only a couple of programs and gave the ip address.

Added groups and users.

I have two accounts on the controller:

the usual one with which I work in which there are different groups with mailing lists and the admin account, which, for logging into the controller, is respectively in the Domain admins

group

Here's what he writes:

I tried to set the group and add it manually to the Administrators Group, and the same thing to the Remote Desktop group

. What could be the problem?