For more details turn on detailed exceptions by setting 'DetailedErrors: true' in 'appSettings.Development.json' or set 'CircuitOptions.DetailedErrors'

services.AddServerSideBlazor().AddCircuitOptions(options => {  options.DetailedErrors = true; });

services.AddServerSideBlazor().AddCircuitOptions(o =>
{
    if (env.IsDevelopment())
    {
        o.DetailedErrors = true;
    }
});