Fixed customer group bug in cart rule and fixed a bug in coupon apply rule

packages/Webkul/Discount/src/Helpers/CouponAbleRule.php

@@ -41,6 +41,10 @@ class CouponAbleRule extends Discount
             }
         }
 
+        if (! isset($applicableRule)) {
+            return false;
+        }
+
         $applicability = $this->checkApplicability($applicableRule);
 
         if ($applicability) {

packages/Webkul/Discount/src/Helpers/Discount.php

@@ -85,8 +85,10 @@ abstract class Discount
         // customer groups based constraints
         if (auth()->guard('customer')->check()) {
             foreach ($rule->customer_groups as $customer_group) {
-                if ($customer_group->customer_group_id == auth()->guard('customer')->user()->group->id) {
-                    $customerGroupBased = true;
+                if (auth()->guard('customer')->user()->group->exists()) {
+                    if ($customer_group->customer_group_id == auth()->guard('customer')->user()->group->id) {
+                        $customerGroupBased = true;
+                    }
                 }
             }
         } else {

packages/Webkul/Product/src/Providers/ProductServiceProvider.php

@@ -39,7 +39,7 @@ class ProductServiceProvider extends ServiceProvider
 
     public function registerConfig() {
         $this->mergeConfigFrom(
-            dirname(__DIR__) . '/Config/product_types.php', 'product_types'
+            dirname(__DIR__) . '/Config/product-types.php', 'product-types'
         );
     }