You have file 'tidytlg/man/tidytlg.Rd' with \docType{package}, likely intended as a package overview help file, but without the appropriate PKGNAME-package \alias as per "Documenting packages" in R-exts.
This seems to be the consequence of the breaking change
Using @docType package no longer automatically adds a -package alias.
Instead document _PACKAGE to get all the defaults for package
documentation.
As explained in the issue, to get the desired PKGNAME-package \alias back, you should either change to the new approach and document the new special sentinel
"_PACKAGE"
or manually add
@aliases tidytlg-package
if remaining with the old approach.
Please fix in your master sources as appropriate, and submit a fixed version of your package within the next few months.
Received the following from CRAN: