In the project built by react, the bootstrap style doesn't work?

as shown in the figure:
Why has container introduced the style of bootstrap, but the style of col-xs-11 has not taken effect?

Mar.10,2021
The version of

bootstrap < del > ~ < / del > ~ hmmm, it took me a long time to find out that guide read it wrong again

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-64f5-1e5061c-43dd4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e5061c-43dd4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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