Fix json rendering error

app/controllers/api/api_controller.rb

@@ -1,11 +1,19 @@
 class Api::ApiController < ActionController::API
-  include TokenVerification, MultiTenancy
+  include MultiTenancy
+  include TokenVerification
   include ActionController::MimeResponds
+  include ActionView::Rendering
 
   # before_action :lookup_domain
   helper_method :current_token, :current_login_employee, :get_cashier
 
   private
+  # ActionView::Rendering override render_to_body breaks render :json,
+  # resulting in an ActionView::MissingTemplate error.
+  def render_to_body(options)
+    _render_to_body_with_renderer(options) || super
+  end
+
   #this is base api base controller to need to inherit.
   #all token authentication must be done here
   #response format must be set to JSON