edit

src/bao/connect/api/Notify.php

@@ -100,7 +100,7 @@ class Notify extends Api
         if ($this->info['notify_sign_col']) {
             $this->info['sign_col'] = $this->info['notify_sign_col'];
         }
-        if ($sign = Dever::isset($input, $this->connect['sign_name'])) {
+        if ($sign = Dever::issets($input, $this->connect['sign_name'])) {
             unset($input[$this->connect['sign_name']]);
             unset($input['l']);
             if ($sign != $this->sign($input)) {