diff --git a/core/Requirement/Openai_item.php b/core/Requirement/Openai_item.php
index f420ad6..eb9c2e6 100644
--- a/core/Requirement/Openai_item.php
+++ b/core/Requirement/Openai_item.php
@@ -362,8 +362,11 @@ public function handle_ajax_request() {
 
                         // Extract Yes/No response
                         $yes_no_response = '';
+                        
                         if (preg_match('/^(Yes|No):/i', $api_content, $matches)) {
-                            $yes_no_response = strtolower(trim($matches[1]));
+                            if (isset($matches[1])) {
+                                $yes_no_response = strtolower(trim($matches[1]));
+                            }
                         }
 
                         if (in_array($yes_no_response, ['yes', 'no'])) {