I am working on a book using bookdown in Rstudio that was being rendered in git_book format, but after changing to bs4_book format all the Latin characters and even the apostrophe in English are not rendered correctly anymore (see image below). You can see the current live version in this page and the repository here.

I installed this version of bookdown, remotes::install_github("rstudio/bookdown#1027") based on this issue in Github, and also installed bslib like this, remotes::install_github("rstudio/bslib")
When I render the book in bs4_book I got the following messages that I did not get before with git_book,
#> Tweaking docs/index.html
#> Tweaking docs/intro.html
#> Tweaking docs/folder-strcutures.html
#> Tweaking docs/collaboration-in-git.html
#> Tweaking docs/stata-github.html
#> Tweaking docs/intro-povcal.html
#> Tweaking docs/prepare.html
#> Tweaking docs/lis-data.html
#> Tweaking docs/primus.html
#> Warning messages:
#> 1: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 02.L contains unnecessary decimal point
#> 2: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 00.L contains unnecessary decimal point
#> 3: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 02.L contains unnecessary decimal point
#> 4: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 02.L contains unnecessary decimal point
#> 5: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 00.L contains unnecessary decimal point
#> 6: In parse(text = text, keep.source = TRUE, encoding = "UTF-8") :
#> integer literal 03.L contains unnecessary decimal point
You can see my session info below,
Thank you so much for your help. Best,
sessioninfo::platform_info()
#> setting value
#> version R version 4.0.2 (2020-06-22)
#> os Windows 10 x64
#> system x86_64, mingw32
#> ui RTerm
#> language (EN)
#> collate English_United States.1252
#> ctype English_United States.1252
#> tz America/New_York
#> date 2020-12-20
Sys.getlocale()
#> [1] "LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252"
stringi::stri_locale_info()
#> $Language
#> [1] "en"
#>
#> $Country
#> [1] "US"
#>
#> $Variant
#> [1] ""
#>
#> $Name
#> [1] "en_US"