[OS X TeX] backref

[George Gratzer]

I'm just finishing a book. The package hyperref works, what a blessing. Unfortunately, 
\usepackage[backref]{hyperref}

does not. 

Error message:

[401] [402] [403]

./CBook0915.tex:20818: LaTeX Error: \verb ended by end of line.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.20818 \bibitem{gCx}

The reference is to

\bibitem{gCx}
G. Cz\'edli,
Slim patch lattices as absolute retracts and maximal lattices.\\
\texttt{arXiv:2105.12868}

Any suggestion?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20220917/daf40c17/attachment.htm>