The ng g pipe command of angular-cli cannot add directories. Why?

as shown in the figure, if the, ng g pipe command does not add a directory, it can specify a module, but after adding a directory, it indicates that the specified module no longer exists. Why?

Mar.20,2021

version problem was resolved after upgrading the version.

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-64f5-1b30471-2bd17.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30471-2bd17.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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