mail

app/Http/Controllers/Admin/MailController.php

@@ -88,7 +88,7 @@ class MailController extends Controller
                 $value->BonusString = '';
                 foreach ($bonus as $k => &$v) {
                     $v = explode(',', $v);
-                    $value->BonusString .=  $gift[$v[0]] . ($v[1] / 100) . ',';
+                    $value->BonusString .=  ($gift[$v[0]]??'') . ($v[1] / 100) . ',';
                 }
             }
         }