This is the package I am using to cite in my master thesis and the error that's occurring is the one displayed in the title. I don't understand where this error is coming from. If you need to see any more of the code for a solution just let me know. I'm happy for any help! Thanks a lot for trying to solve my problem.
\usepackage[backend=biber,style=numeric,natbib=true]{biblatex}
\addbibresource{Literaturliste.bib}
\ExecuteBibliographyOptions{sorting=nyt,maxbibnames=999,
maxcitenames=1,
backref=false,
bibencoding=utf8,
defernumbers=true}
.blgfile (on Windows the.blgfile may be classified as a 'Performance Monitor' file, but it is still a plain text file that you can open with your favourite text editor), please post its complete contents here. – moewe Nov 05 '18 at 09:54.blgfile that strongly suggests that you did not run Biber or that there was such a fatal error that Biber had to abort immediately even without writing a.blg(the latter option is quite unlikely). On Windows PCs the.blgfile might be classified as a 'performance monitor file', it might be easier to find the files if you display file extensions, - the files written by Biber, however, are just simple plain text files that you can open with your favourite text editor. Double check that your Biber configurations are OK. ... – moewe Nov 26 '18 at 13:12