Yes, one of a entry type was not defined, yesterday late night only fixed this error, thanks to all. Also, please confirm that whether autocite can be handle as like as natbib options like citep, citet, citealp, etc. Example shown below:
\documentclass{article}
\usepackage{filecontents}
%
\begin{filecontents}{\jobname.bib}
@online{NationalSecurityAgency_2012,
title = {{{SKYNET}}: {{Courier Detection}} via {{Machine Learning}}},
url = {
https://theintercept.com/document/2015/05/08/skynet-courier/},
shorttitle = {{{SKYNET}}},
timestamp = {2015-10-29T10:36:06Z},
journaltitle = {The Intercept},
author = {National Security Agency},
urldate = {2015-10-29},
date = {2012}
}
@book{smith2,
author = {Smith, John},
title = {Second Book},
date = {2013-11-02}
}
\end{filecontents}
%
\usepackage[backend=biber,authordate,doi=false,url=false,isbn=false]{biblatex-chicago}
\addbibresource{\jobname.bib}
\AtEveryBibitem{% Clean up the bibtex rather than editing it
\ifentrytype{online}
{}
{\clearfield{urlyear}\clearfield{urlmonth}\clearfield{urlday}}}%
\begin{document}
Foo \autocite{smith2}.
(see the U.S. government's \texttt{SkyNet} for one
example of a machine learning surveillance system
\autocite{NationalSecurityAgency_2012})
\printbibliography
\end{document}
In this, I donot require the ( and ) for the tag \autocite{NationalSecurityAgency_2012}, is it possible to fix?