figure environment isn't compiling with babel and hebrew in pdflatex

Question

I have a project that is written both in Hebrew and in English, which is compiled with pdfLatex on Overleaf. Since this compiler is not a Unicode engine, one has to declare the Hebrew letters explicitly (as I learned here). This is the reason for the \DeclareUnicodeCharacter{---}{\heb---} commands in the preamble below.

It works fine, up until the moment I wanted to insert an image to my document, with a figure environment.

The main.tex and chapter01.tex files are given below, with the hierarchical file structure:

\documentclass{tufte-book} % Tufte-book format
% Encoding stuff
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[main=english, hebrew]{babel}
%% Herbew letters declarations %%
\DeclareUnicodeCharacter{05D0}{\hebalef}
\DeclareUnicodeCharacter{05D1}{\hebbet}
% and so on until
\DeclareUnicodeCharacter{05EA}{\hebtav}
\usepackage{subfiles} % Best loaded last in the preamble. Used to break the content of the project into smaller files
\begin{document}
\subfile{subfiles/chapter01}
\subfile{subfiles/chapter02}
\end{document}

\documentclass[main.tex]{subfiles}

\begin{document}
\selectlanguage{hebrew}
כיתוב בעברית.
\selectlanguage{english}
Some english text, and this is a figure:
\begin{figure}
    \centering
    \includegraphics{images/figure01.png}
\end{figure}
% No figure!
\end{document}

root folder
├main.tex
└───figures
| │ figure01.png
│ │ figure02.png
│ │ figure03.png
└───subfiles
| │ chapter01.tex
| │ chapter02.tex
| │ chapter03.tex

The log has the following errors:

Missing \endcsname inserted.
Use of \m@^_ doesn't match its definition.
Missing number, treated as zero.
Extra \endcsname.
Undefined control sequence.   l.10  \includegraphics{figures/figure.png}

Can anyone address me to why it happens and how to fix it?

Output:

Answer 1

This seems to be a clash between the changepage package (which is used by tufte-book) and the babel support for Hebrew, which changes to code for arabic numbers.

It will probably be solved by putting these lines in your preamble:

\makeatletter
\def\thecp@cntr{\@@arabic\c@cp@cntr}
\makeatother

And the undefined control sequence can be solved by adding

\usepackage{graphicx}