我有以下代码：
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Please note that whilst this template provides a
% preview of the typeset manuscript for submission, it
% will not necessarily be the final publication layout.
%
%% Document class options: (**...** are defaults)
% - bibtex: Uses bibtex+natbib, chicago.bst
% - biblatex: Uses biblatex-chicago
% You MUST select one of the above two options, depending
% on whether you prefer bibtex or biblatex. This template
% contains code that uses bibtex.
% - twocolumn: Switch to two column for main text
% - singlespace/onehalfspace/**doublespace**:
% changes line spacing for main text
% - **blind**/nonblind: Anonymises authors
% and affiliations, or not
% - autowc: Automatically inserts a word count
% after the abstract, using texcount.
% The abstract is ignored.
% NOTE THAT THIS WILL ONLY WORK IF YOU HAVE
% INSTALLED TEXCOUNT, AND HAVE ENABLED --shell-escape
% OR --enable-write18. (These will work on Overleaf.)
% If you get an error about "texcount not found", delete
% the autowc option, and manually specify the wordcount
% with \totalwordcount{xxx}.
%%% autowc may cause longer compilation time. You can
%%% disable it first while actively editing, and only
%%% enable it when you're ready to take stock and check
%%% on your work.
\documentclass[biblatex]{apsr_submission}
\title{American Political Science Review \emph{(APSR)} Submission Template}
\author{Author One}
{Affiliation A}
{Author One is PhD Candidate, ABC Department, Affiliation A, 12345 NY. ([email protected])}
\author{Author Two}
{Affiliation C}
{Author Two is Assistant Professor, Faculty of Z, Affiliation B, 42813. Corresponding Author ([email protected]) Additional notes about Author Two.}
\author{Author Three}
{Affiliation B}
{Author Three is ...}
%% These are used for the headers
\runningtitle{APSR Submission Template}
\runningauthor{Author One, Author Two, and Author Three} % 4 + Authors, Author One et al.
%% Useful packages
%% If you are using a custom figure or table environment from a package and it's not getting framed, add \makeframedenv{MyFigure} in the preamble, where the custom figure environment is \begin{MyFigure}...\end{MyFigure}.
%% Currently table, table*, figure, figure*, longtable, supertabular, sidewaystable and sidewaysfigure will be automatically framed.
%% Handy for setting wide tables/figures in landscape
\usepackage{pdflscape}
\usepackage{rotating}
\begin{document}
%%% DO NOT REMOVE THESE LINES. For automatic word count.
%TC:ignore
\begin{frontmatter}
\begin{abstract}
Your abstract. It should be at least three lines long to accommodate the dropped-cap. \lipsum[1]
\end{abstract}
\end{frontmatter}
%%% DO NOT REMOVE THIS LINE. For automatic word count.
%TC:endignore
\section{Introduction}
\begin{sidewaystable}
\caption{An example table}
\label{tab:widgets}
\centering
\begin{tabular}{lr}
Item & Quantity \\\midrule
Widgets & 42 \\
Gadgets & 13
\end{tabular}
\floatnote{This is a note for this table.}
\end{sidewaystable}
\end{document}
apsr_submission cls 可以从以下网址下载这里
显然，sidewaystable 不起作用。我收到以下错误：
! LaTeX Error: Not in outer par mode.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.312 \caption
{The logit model \label{logit}}
?
文件 apsr 类也应该与 sideways 一起工作。
我不知道错误在哪里。有什么帮助吗？提前致谢。