When referencing select in element-ui on the page, the drop-down arrow does not display

when referencing select in element-ui on the page, the drop-down arrow does not show
element-ui version: ^ 2.4.9, Baidu has a lot of problems, it seems to have no such problem, it is also strange, forget the bosses to point out

Sep.24,2021

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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-64f5-1eb77d7-265a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eb77d7-265a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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