{"success":false,"msg":"Uncaught InvalidArgumentException: Malformed UTF-8 characters, possibly incorrectly encoded in \/data\/wwwroot\/app.qianfanedu.cn\/thinkphp\/library\/think\/response\/Json.php:39\nStack trace:\n#0 \/data\/wwwroot\/app.qianfanedu.cn\/thinkphp\/library\/think\/Response.php(312): think\\response\\Json->output(false)\n#1 \/data\/wwwroot\/app.qianfanedu.cn\/thinkphp\/library\/think\/Response.php(108): think\\Response->getContent()\n#2 \/data\/wwwroot\/app.qianfanedu.cn\/thinkphp\/library\/think\/Error.php(47): think\\Response->send()\n#3 [internal function]: think\\Error::appException(Object(think\\exception\\HttpException))\n#4 {main}\n thrown at thinkphp\/library\/think\/response\/Json.php line 39","code":0}