I am sorry but the plan does not seem to be a starter one.
here are couple of parameters I got from the Shop.
"plan_display_name"=>"professional","plan_name"=>"professional","google_apps_login_enabled"=>true,"money_in_emails_format"=>"${{amount}}","money_with_currency_in_emails_format"=>"${{amount}} USD","eligible_for_payments"=>true,"requires_extra_payments_agreement"=>false,"password_enabled"=>false,"has_storefront"=>true},Can you please check this? I assume the shop is not on a starter plan. Thanks