About the problem that gateway started successfully but websocket could not connect

everything is fine in the local php7.1, LAN test.
the php5.4 test on the server shows that the websocket of gateway starts successfully, but the result that the websocket client cannot connect to, request header is Provisional headers are shown

. What will happen to

?

Workerman websocket gateway
Oct.29,2021

workerman has video tutorials, which are pretty good. Web site: https://study.163.com/course/.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2ba23-4d14c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2ba23-4d14c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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