Hi,
I was able to install store commerce in my development system with out any issue. Then i updated the client machine with Store commerce, it first asked for installing Edge webview2. Once webview was installed the store commerce app in opening. But when trying to activate the POS the User authentication screen will begin to show and disappear and the POS will show authentication failure message. On inspecting the event viewer i can see the error, MSAL.Desktop.4.40.0.0.MsalClientException,
ErrorCode: authentication_canceled
Microsoft.identity.Client.MsalClientException: WAM Account Picker did not return an account. Either the user cancelled the authentication or the WAM Account Picker crashed because the app is running in an elevated process.
Please note the Modern POS was running in the same system with out any issue.