XeLaTeX tables not compiling when using polyglossia Arabic

I am switching from pdfLaTeX to XeLaTeX to simplify the use of obscure Cyrillic and Arabic characters in a single document in which English is the default language, but I’m finding that tables are not compiling when I use Arabic as one of the other languages. As soon as I take out Arabic and leave only English and Russian, tables work fine. Any idea how to fix this?

Here is a MWE:

documentclass[a4paper]{book} 
usepackage{fontspec}
setmainfont{Times New Roman}

usepackage[margin=1in,headsep=.3in]{geometry}
sloppy
usepackage{setspace}
doublespacing
usepackage{parskip}
usepackage{needspace}
usepackage[bottom]{footmisc}
usepackage{fancyhdr}
usepackage[table]{xcolor}
usepackage{pifont}
usepackage{amsmath}
usepackage{dingbat}
usepackage{diagbox}
usepackage{slashbox}
usepackage{multicol}
usepackage{multirow}
usepackage[labelfont=bf]{caption}
usepackage{vowel}  
usepackage{tikz-qtree}
usepackage{gb4e}
noautomath
usepackage{bold-extra}
usepackage{soul}
makeatletter
renewcommand{thexnumi}{if@noftnote@xsi{xnumi}elseroman{xnumi}fi}
makeatother
usepackage{natbib}
setcitestyle{aysep={},notesep={: }}
usepackage{bold-extra}
usepackage{footnote}
makesavenoteenv{tabular}
makesavenoteenv{table}
raggedbottom
setcounter{secnumdepth}{4}
usepackage{graphicx,calc}
newcommand*{img}[1]{%
    raisebox{-.3baselineskip}{%
        includegraphics[
        height=.6cm,
        width=.6cm,
        keepaspectratio,
        ]{/Users/ClintParker/Desktop/Thesis/Images/#1}%
    }%
}
usepackage{stackengine}

    makeatletter
    defthebibliography#1{chapter*{References@mkboth
      {REFERENCES}{REFERENCES}}list
      {[arabic{enumi}]}{settowidthlabelwidth{[#1]}leftmarginlabelwidth
    advanceleftmarginlabelsep
    usecounter{enumi}}
    defnewblock{hskip .11em plus .33em minus .07em}
    sloppyclubpenalty4000widowpenalty4000
    sfcode`.=1000relax}
    makeatother
    
usepackage[bookmarks=false, colorlinks=true, allcolors=, breaklinks]{hyperref}

%%%Polyglossia%%%
usepackage{polyglossia}
setdefaultlanguage{english}
setotherlanguages{russian, arabic}  
newfontfamilyarabicfont{Al Nile}


begin{document}

begin{table}[h]
centering
begin{tabular}{cc}
hline
Hello & Hi 
hline
end{tabular}
end{table}

end{document}

And here are the errors I’m getting:

./XeLaTeX Practice.tex:82: Extra }, or forgotten endgroup.
@endfloatbox ...pagefalse outer@nobreak egroup 
                                                  color@endbox 
l.82 end{table}
                
? ./XeLaTeX Practice.tex:82: Missing } inserted.
<inserted text> 
                }
l.82 end{table}
                
? 
./XeLaTeX Practice.tex:84: LaTeX Error: begin{table} on input line 75 ended by
 end{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.84 end{document}
                   
? 
./XeLaTeX Practice.tex:84: LaTeX Error: Float(s) lost.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.84 end{document}
                   
? 

Thanks very much for your help!