clear error messages on order and bill address on first load

app/controllers/split_checkout_controller.rb

@@ -25,6 +25,8 @@ class SplitCheckoutController < ::BaseController
     # a version of paypal that uses this controller, and more specifically
     # the #action_failed method, then we can remove this call
     # OrderCheckoutRestart.new(@order).call
+    @order.errors.clear
+    @order.bill_address.errors.clear
   rescue Spree::Core::GatewayError => e
     rescue_from_spree_gateway_error(e)
   end