I am a Latex novice. I am using online ShareLatex and have a document which was compiling normally and I was using Bibtex as default for the literature i.e. the commands \bibliographystyle and \bibliography to show the output. At some point I wrongly added the line \usepackage[block=ragged]{biblatex} in the preamble which calls Biblatex. Apart from not getting the desired result, now if I remove this line the document doesn't compile anymore (with the error "undefined control sequence"). Is there a way I can resolve this problem?
Thank you.