This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex 2019.10.4) 2 SEP 2020 15:33 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **abstract.tex (./abstract.tex LaTeX2e <2018-12-01> ! LaTeX Error: Environment abstracts undefined. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.6 \begin{abstracts} %this creates the heading for the abstract page Your command was ignored. Type I to replace it with another command, or to continue without it. ! LaTeX Error: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.8 a bstract or summary here, if needed. You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. Missing character: There is no a in font nullfont! Missing character: There is no b in font nullfont! Missing character: There is no s in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no a in font nullfont! Missing character: There is no c in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no s in font nullfont! Missing character: There is no u in font nullfont! Missing character: There is no m in font nullfont! Missing character: There is no m in font nullfont! Missing character: There is no a in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no y in font nullfont! Missing character: There is no h in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no , in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no f in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no . in font nullfont! Overfull \hbox (20.0pt too wide) in paragraph at lines 8--9 [] [] ! LaTeX Error: \begin{document} ended by \end{abstracts}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.10 \end{abstracts} Your command was ignored. Type I to replace it with another command, or to continue without it. ) ! Emergency stop. <*> abstract.tex *** (job aborted, no legal \end found) Here is how much of TeX's memory you used: 6 strings out of 492616 143 string characters out of 6129481 57212 words of memory out of 5000000 4026 multiletter control sequences out of 15000+600000 3640 words of font info for 14 fonts, out of 8000000 for 9000 1141 hyphenation exceptions out of 8191 6i,0n,6p,100b,19s stack positions out of 5000i,500n,10000p,200000b,80000s ! ==> Fatal error occurred, no output PDF file produced!