Please see the problems shown on
<https://cran.r-project.org/web/checks/check_results_lintr.html>.

Apparently your package fails its checks in a strict Latin-1* locale,
e.g. under Linux using LANG=en_US.iso88591 (see the debian-clang
results).

Please correct before 2022-08-30 to safely retain your package on CRAN.