laravel stream_socket_client 报错

$client = stream_socket_client('tcp://127.0.0.1:2001', $errno, $errmsg, 30);# laravel8 这一句存在就报错了
if(!$client) return ['code'=>$errno,'message'=>$errmsg];

{
    "message": "Malformed UTF-8 characters, possibly incorrectly encoded",
    "exception": "InvalidArgumentException",
    "file": "D:\\phpstudy_pro\\WWW\\v2.cc\\vendor\\laravel\\framework\\src\\Illuminate\\Http\\JsonResponse.php",
    "line": 84
}