# ! Undefined control sequence. \tightlist

I am getting the following error when building a `rticle` document with markdown.

``````rmarkdown::render("Prolfqua.Rmd", output_format = acs_article())
``````

and this produces the following error

``````! Undefined control sequence.
l.400 \tightlist

Error: LaTeX failed to compile Prolfqua.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See Prolfqua.log for more info.
``````

However, I know that this was working some time ago. I suspect that this error might be related to updating to R.4.1 and reinstalled all packages. Any suggestions?

Bdw I am on windows and I am using MiKTeX 2.9 .

The pandoc version in my path is:
C:\Users\wewol>pandoc --version
pandoc 2.9.2.1
Compiled with pandoc-types 1.20, texmath 0.12.0.1, skylighting 0.8.3.2
Default user data directory: C:\Users\wewol\AppData\Roaming\pandoc
However, since I am using `rticle` and all was working before, I would not even know where "your custom template" is.