fix

classes/fpf/http/CurlHttpClient.php

@@ -168,7 +168,7 @@ class CurlHttpClient
         // Connect failed?
         if (!$this->response) {
             $error = 'CurlHttpClient: Could not connect to ' . $full_url;
-            \Yii::$app->fpf->error('http',  curl_errno($this->curl_handle), __CLASS__, __FUNCTION__,  ' ERROR:' .$error);
+            \Yii::$app->fpf->error('http',  curl_error($this->curl_handle), __CLASS__, __FUNCTION__,  ' ERROR:' .$error);
             curl_close($this->curl_handle);
             $this->curl_handle = null;
             throw new CurlHttpException($error, CurlHttpException::NOT_OPEN);