ok

resources/views/pay/middleware.blade.php

@@ -18,7 +18,10 @@
         return(false);
     }
     var wx_url = getQueryVariable('wx_url');
-    window.location.href = wx_url;
+    if(wx_url)
+    {
+        window.location.href = wx_url;
+    }
 </script>
 
 </html>