[R-pkg-devel] Possible Tinytex issue on CRAN Windows machines

Dear all,

I attempted to submit an update for a CRAN package fairadapt
<https://cran.rstudio.com/web/packages/fairadapt/index.html> (version
0.2.2). When running checks locally (OS X, R 4.1.0) and/or on Github CI
workflows, there are no errors or warnings appearing. Furthermore, when
running checks on win-builder provided by R-project, all the checks are
successful, both for R-devel (see log
<https://win-builder.r-project.org/0Y3mj5lAiSA9/00check.log>) and R-release
(see log <https://win-builder.r-project.org/9BmncrRlr17N/00check.log>).

However, when submitting to CRAN, an error in rebuilding the vignette pops
up on Windows (the log
<https://win-builder.r-project.org/incoming_pretest/fairadapt_0.2.2_20220408_111131/Windows/00check.log>
is
here). The source code in the vignette that causes the issue is here
<https://github.com/dplecko/fairadapt/blob/26a1ae735abfb018a696cb32430fc6ff85b7fca4/vignettes/jss.Rmd#L307-L354>.
On linux there are no issues (log
<https://win-builder.r-project.org/incoming_pretest/fairadapt_0.2.2_20220408_111131/Debian/00check.log>).
Also, in the previous CRAN release of the package, the same code did not
cause any issues on Windows.

The problem could be due to an outdated installation of Tinytex on the CRAN
machines (the issue <https://github.com/yihui/tinytex/issues/293> appeared
last year around 1st of April). However, without being able to reproduce
the problem, it is very difficult to solve it.

Would anyone have a suggestion on whether this is a "false positive" check?
Otherwise, any pointers on how to troubleshoot such a problem in general
would be really welcome.

Thank you in advance,
Drago