You have placed an alignment TAB character ‘& ‘In the wrong place. If you want to align something, you must write it inside an align environment such as \ begin{align}… \ end{align}, \ begin{tabular}… \end{tabular}, etc. If you want to write an ampersand ‘& ‘ in text, you must write \& instead.
Solutions:
1. Check the &amp in the article first; Whether rules are adhered to in use.
2. If the &amp in the article is excluded; “, so go straight to the references, in the.bib file, search for & , all changed to \& .
To be updated…