ACP2E-98: Customer with global account sharing has to login again in the secondary website when guest checkout is disabled

- Adding check to load JS file only if the global account sharing is enabled by Admin.

Author: Mohan Ahuja

app/code/Magento/Customer/Block/Account/AuthenticationPopup.php

@@ -119,4 +119,16 @@ public function getCustomerForgotPasswordUrl()
     {
         return $this->getUrl('customer/account/forgotpassword');
     }
+
+    /**
+     * Get global account sharing is enabled or not
+     *
+     * @return string
+     */
+    public function isGlobalScopeEnabled()
+    {
+        $shareConfig = \Magento\Framework\App\ObjectManager::getInstance()
+            ->get(\Magento\Customer\Model\Config\Share::class);
+        return $shareConfig->isGlobalScope();
+    }
 }

app/code/Magento/Customer/view/frontend/templates/account/authentication-popup.phtml

@@ -20,8 +20,11 @@
             "*": {
                 "Magento_Ui/js/block-loader": "<?= $block->escapeJs($block->escapeUrl($block->getViewFileUrl(
                     'images/loader-1.gif'
-                ))) ?>",
+                ))) ?>"
+                <?php if ($block->isGlobalScopeEnabled()): ?>
+                ,
                 "Magento_Customer/js/customer-global-session-loader": {}
+                <?php endif; ?>
             }
         }
     </script>