Assignment to read-only attribute reactjs is not allowed in strict mode

an ordinary post request. Google browser is normal, but an error is reported under ie. What is the reason for this?

the following is a callback function for the click event of the download file button

Apr.02,2021

formElement.style.display = 'none'
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-64f5-1e44ed0-44038.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e44ed0-44038.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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