LaTeX Error: Environment ThreePartTable undefined

I am trying to create a table using apa_table(), Papaja, and RMarkdown in RStudio. Whenever I include longtable in the apa_table function, I get the error:

! LaTeX Error: Environment ThreePartTable undefined.

Strangely, the error log that's produced includes:

(/home/tim/.TinyTeX/texmf-dist/tex/latex/threeparttable/threeparttable.sty
Package: threeparttable 2003/06/13  v 3.0

and

Package caption Info: threeparttable package is loaded.

Note the different capitalization between the error and the loaded package, which makes me wonder if that's the issue.

Note that this is the same error as reported in an earlier question: ! LaTeX Error: Environment threeparttable undefined. However, the solution provided there does not work for me.

I'm not sure if this will be reproducible outside of my particular setup, but here is some code that produces the problem for me.

Note that I do not have the same issue if I simply use kable() (also included below).

---
title             : "The title"
shorttitle        : "Title"

author: 
  - name          : "First Author"
    affiliation   : "1"
    corresponding : yes    # Define only one corresponding author
    address       : "Postal address"
    email         : "my@email.com"
  - name          : "Ernst-August Doelle"
    affiliation   : "1,2"

affiliation:
  - id            : "1"
    institution   : "Wilhelm-Wundt-University"
  - id            : "2"
    institution   : "Konstanz Business School"

authornote: |


abstract: |


keywords          : "keywords"
wordcount         : "X"

floatsintext      : no
figurelist        : no
tablelist         : no
footnotelist      : no
linenumbers       : yes
mask              : no
draft             : no
tables            : yes

documentclass     : "apa6"
classoption       : "man"
output            : papaja::apa6_pdf
---

```{r setup, include = FALSE}
library("papaja")
library("knitr")
library("kableExtra")
```

```{r, results="asis"}
kable(mtcars, longtable=TRUE)
```

```{r, results="asis"}
apa_table(mtcars, longtable=TRUE)
```

\begingroup
\setlength{\parindent}{-0.5in}
\setlength{\leftskip}{0.5in}

<div id = "refs"></div>
\endgroup

Here is the output from sessionInfo() in case it helps:

R version 3.6.1 (2019-07-05)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Linux Mint 19.2

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1

locale:
 [1] LC_CTYPE=en_AU.UTF-8       LC_NUMERIC=C               LC_TIME=en_AU.UTF-8        LC_COLLATE=en_AU.UTF-8    
 [5] LC_MONETARY=en_AU.UTF-8    LC_MESSAGES=en_AU.UTF-8    LC_PAPER=en_AU.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C             LC_MEASUREMENT=en_AU.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.3        digest_0.6.23     crayon_1.3.4      withr_2.1.2       assertthat_0.2.1  evaluate_0.14     rlang_0.4.2      
 [8] cli_1.1.0         rstudioapi_0.10   rmarkdown_1.18    tools_3.6.1       xfun_0.11         yaml_2.2.0        compiler_3.6.1   
[15] sessioninfo_1.1.1 papaja_0.1.0.9842 htmltools_0.4.0   knitr_1.26

Solution

You need the threeparttablex style for the ThreePartTable environment. In principle papaja tries to load this style, but there seems to be an incompatibility with recent rmarkdown. Since this seems to be a regression in rmarkdown, I have opened an issue for it. As a workaround you can downgrade to an older version of rmarkdown. Meanwhile, you can also install a fixed version from GitHub: remotes::install_github('rstudio/rmarkdown').