Ng+ionic3 error 'acionsheet' is not a known element

report an error, as shown in the following figure
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ionic g component acionsheet:
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:

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pagesabout
app.module.ts:

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about.html

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:
package.json
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ask for help to see where there is something wrong, thank you!

Mar.05,2021

should be a version problem, 4.1.3

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-64f5-1ea0a17-1af5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea0a17-1af5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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