Have a look at the article below to solve any installation errors:
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(Booker25EmailTemplates) To create email template folders, enable Folders and Enhanced Sharing -
(GoMeddoOrangeBlackFav) You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary. -
[LightningComponentBundle] lwc:is can only be used when dynamic components have been enabled