when I access the page there is an IO error.

[kinbod]

{"code":1,"message":"Session ID unknown"}

http://192.168.31.101/socket.io/?EIO=3&transport=polling&t=1529840473457-899&sid=kFSNX1sI_cafM0_rAASP

Host: 192.168.31.101
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0
Accept: /
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Referer: http://192.168.31.101/
Cookie: io=kFSNX1sI_cafM0_rAASP; connect.sid=s%3AsZ8BXkrTvtTJU2Ax29IlbQ8gu-hKhIee.ylYMY7fSphYNOerINGehqy8ubF0KTdtba3Hxdq3LQY0
Connection: keep-alive

400 Bad Request