CrossDomain confirma only when Multistore Active

If GA_CROSSDOMAIN_ENABLED is not set, Tools::getValue('GA_CROSSDOMAIN_ENABLED') will return False, then $gaCrossdomainEnabled is assigned to False.
In turn (null !== $gaCrossdomainEnabled) is True because (null !== False).

Author: leemyongpakvn

classes/Form/ConfigurationForm.php

@@ -204,6 +204,9 @@ public function generate()
      */
     public function treat()
     {
+        // Check if multistore is active
+        $is_multistore_active = Shop::isFeatureActive();
+
         $treatmentResult = '';
         $gaAccountId = Tools::getValue('GA_ACCOUNT_ID');
         $gaUserIdEnabled = Tools::getValue('GA_USERID_ENABLED');
@@ -223,7 +226,7 @@ public function treat()
             $treatmentResult .= $this->module->displayConfirmation($this->module->getTranslator()->trans('Settings for User ID updated successfully', [], 'Modules.GAnalytics.Admin'));
         }
 
-        if (null !== $gaCrossdomainEnabled) {
+        if ($is_multistore_active) {
             Configuration::updateValue('GA_CROSSDOMAIN_ENABLED', (bool) $gaCrossdomainEnabled);
             $treatmentResult .= $this->module->displayConfirmation($this->module->getTranslator()->trans('Settings for User ID updated successfully', [], 'Modules.GAnalytics.Admin'));
         }