handle focus error on blazor web assembly when verifying email address

[pyramidsbuilder]

How to reproduce:
1- set the site render mode to blazor web assembly
2- register as new user
3- Open the email verification link

result:
Error : System.AggregateException: One or more errors occurred. (ElementReference has not been configured correctly.)
---> System.InvalidOperationException: ElementReference has not been configured correctly.
at Microsoft.AspNetCore.Components.ElementReferenceExtensions.GetJSRuntime(ElementReference elementReference)
at Microsoft.AspNetCore.Components.ElementReferenceExtensions.FocusAsync(ElementReference elementReference, Boolean preventScroll)
at Microsoft.AspNetCore.Components.ElementReferenceExtensions.FocusAsync(ElementReference elementReference)
at Oqtane.Modules.Admin.Login.Index.OnAfterRenderAsync(Boolean firstRender) in C:\server\opensource\Oqtane\oqtane.framework\Oqtane.Client\Modules\Admin\Login\Index.razor:line 182
--- End of inner exception stack trace ---

solution for now:
handle the null reference of the username element reference

[sbwalker]

@pyramidsbuilder do you have any idea why the username ElementReference is not configured correctly in this scenario?

[pyramidsbuilder]

@sbwalker sorry I don't know