I have a self installed VM in Windows Server 2012 R2 for M-POS, when I try open Retail POS (beta) with domain\administrator, I got error

In event viewer
Activation of app Microsoft.Dynamics.Retail.Pos.Beta_8wekyb3d8bbwe!App failed with error: This app can't be activated by the Built-in Administrator. See the Microsoft-Windows-TWinUI/Operational log for additional information.
When I look into Microsoft-Windows-TWinUI/Operational log
The app Microsoft.Dynamics.Retail.Pos.Beta_8wekyb3d8bbwe!App could not be activated for the Windows.Launch contract because the current user is an Administrator with a full token. Only split token Administrators can activate apps.
I've look into this post https://community.dynamics.com/ax/f/33/t/129751 but can't understand how to solve it.
I've try login VM from a different user, let say domain\axuser, but I can't see Retail POS (beta) in my list of apps.
Can anybody tell me how to log in Modern POS ?
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