diff --git a/connector-miravia/classes/class.api.php b/connector-miravia/classes/class.api.php
index 7e4d851..b60820f 100644
--- a/connector-miravia/classes/class.api.php
+++ b/connector-miravia/classes/class.api.php
@@ -20,7 +20,8 @@ if( !class_exists('APIMIRAVIA') ) {
                 'miravia_get_brands',
                 'miravia_connect_product',
                 'disconnect_product_miravia',
-                'test_miravia_api_connection'
+                'test_miravia_api_connection',
+                'debug_miravia_credentials'
             );
             foreach( $actionsPrivate as $action ){
                 add_action( 'wp_ajax_'.$action, array( $this, $action ) );
@@ -586,6 +587,23 @@ if( !class_exists('APIMIRAVIA') ) {
             }
         }
 
+        function debug_miravia_credentials() {
+            if (!current_user_can('manage_options')) {
+                wp_die('Unauthorized');
+            }
+            
+            $app_key = get_option('miravia_app_key', '');
+            $secret_key = get_option('miravia_secret_key', '');
+            $access_token = get_option('miravia_access_token', '');
+            
+            echo "<h3>Current Miravia Credentials:</h3>";
+            echo "<p>App Key: " . esc_html(substr($app_key, 0, 10)) . "..." . " (length: " . strlen($app_key) . ")</p>";
+            echo "<p>Secret Key: " . esc_html(substr($secret_key, 0, 10)) . "..." . " (length: " . strlen($secret_key) . ")</p>";
+            echo "<p>Access Token: " . esc_html(substr($access_token, 0, 20)) . "..." . " (length: " . strlen($access_token) . ")</p>";
+            
+            wp_die();
+        }
+
         function miravia_update_product() {
             if ( !current_user_can( 'manage_woocommerce' ) ) { exit; }
             $result = array(
diff --git a/connector-miravia/classes/shared/MiraviaSdk.php b/connector-miravia/classes/shared/MiraviaSdk.php
index bca53d9..2b7e2cb 100644
--- a/connector-miravia/classes/shared/MiraviaSdk.php
+++ b/connector-miravia/classes/shared/MiraviaSdk.php
@@ -22,6 +22,11 @@ class MiraviaSdk
         $this->secret_key = get_option('miravia_secret_key', '');
         $this->access_token = get_option('miravia_access_token', '');
         
+        if(class_exists('LOG')) {
+            LOG::add("DEBUG SDK: Loaded credentials - App Key: " . substr($this->app_key, 0, 6) . "...");
+            LOG::add("DEBUG SDK: Loaded credentials - Access Token: " . substr($this->access_token, 0, 20) . "...");
+        }
+        
         if(!empty($this->app_key) && !empty($this->secret_key)) {
             $this->client = new SimpleIopClient('https://api-sg.aliexpress.com/sync', $this->app_key, $this->secret_key);
         }
@@ -275,10 +280,11 @@ class MiraviaSdk
             // Try to get a simple product list to test connection
             $result = $this->getProductList(['page_size' => 1]);
             
-            if($result !== false) {
+            if($result !== false && !isset($result->error_response)) {
                 return ['success' => true, 'message' => 'Connection successful'];
             } else {
-                return ['success' => false, 'error' => $this->last_error];
+                $error = isset($result->error_response) ? $result->error_response->msg : $this->last_error;
+                return ['success' => false, 'error' => $error];
             }
             
         } catch (Exception $e) {