I'm trying to get a table in a PDF using the knitr and kableExtra packages in R but when I compile the PDF the table code is in the PDF not a table. The screen shot below is from the example code provided. The PDF was 11 pages so I only included the first page as an example of the compiled PDF output. I am using knitr and pdfLaTeX. The last time I ran my code in 2021 there were no issues. My code is not provided - just an example, but I'm having the same issues with my code. 
Example code:
\documentclass{article}
\begin{document}
<<table1,include=F,echo=F,message=F,warning=F>>=
library(knitr)
library(kableExtra)
kbl(mtcars)
@
\end{document}
R session info:
sessionInfo()
R version 4.1.2 (2021-11-01)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19044)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] kableExtra_1.3.4 knitr_1.39 openxlsx_4.2.5 plyr_1.8.6 DBI_1.1.2 odbc_1.3.3
[7] lattice_0.20-45
loaded via a namespace (and not attached):
[1] zip_2.2.0 Rcpp_1.0.8 compiler_4.1.2 tools_4.1.2 digest_0.6.29
[6] bit_4.0.4 viridisLite_0.4.0 evaluate_0.15 lifecycle_1.0.1 pkgconfig_2.0.3
[11] rlang_1.0.2 cli_3.2.0 rstudioapi_0.13 xfun_0.30 fastmap_1.1.0
[16] httr_1.4.2 stringr_1.4.0 xml2_1.3.3 systemfonts_1.0.4 vctrs_0.3.8
[21] hms_1.1.1 webshot_0.5.3 bit64_4.0.5 grid_4.1.2 svglite_2.1.0
[26] glue_1.6.2 R6_2.5.1 rmarkdown_2.14 blob_1.2.3 magrittr_2.0.2
[31] scales_1.2.0 ellipsis_0.3.2 htmltools_0.5.2 rvest_1.0.2 colorspace_2.0-3
[36] stringi_1.7.6 munsell_0.5.0
