Others ⇒ Getting unnecessary characters after title and keyword list

[zak100]

Hello,
Following is my code:

Code: Select all

\documentclass[manuscript,screen]{acmart}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{listings}
\input{solidity-highlighting.tex}
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{rotating} 


\usepackage{array, makecell}
\renewcommand\rotheadgape{}
\usepackage{xparse}
\NewExpandableDocumentCommand\mcc{O{1}m}
    {\multicolumn{#1}{>{\bfseries\small}c|}{#2}}

%---------------- show page layout. don't use in a real document!
%\usepackage{showframe}
%\renewcommand\ShowFrameLinethickness{0.15pt}
%\renewcommand*\ShowFrameColor{\color{red}}

\usepackage{lipsum} 
\AtBeginDocument{%
  \providecommand\BibTeX{{%
    \normalfont B\kern-0.5em{\scshape i\kern-0.25em b}\kern-0.8em\TeX}}}


\setcopyright{acmcopyright}
\copyrightyear{2020}
\acmYear{2020}
\acmDOI{10.1145/1122445.1122456}

\begin{document}
\title{A Testing}
%Survey on the Tools Support and Vulnerability Detection in Smart Contracts}


\author{}
\authornote{}
\email{}
%\orcid{}
\author{}
\authornotemark{}
\email{}
\affiliation{
  \institution{}
}
\begin{abstract}
  Testing abstract
\end{abstract}
\begin{CCSXML}
<ccs2012>
<concept>
<concept_id>10002978.10003022</concept_id>
<concept_desc>Security </concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10002944.10011122.10002945</concept_id>
<concept_desc>General overviews</concept_desc>
<concept_significance>500</concept_significance>
</concept>
</ccs2012>
\end{CCSXML}

\ccsdesc[500]{Security and privacy}
\ccsdesc[500]{General and reference}


\keywords{Testing1, Testing2, testing3}


\maketitle

\section{Introduction}



\bibliographystyle{ACM-Reference-Format}
\bibliography{sourcefile-bib}


\end{document}
\endinput

I am getting unnecessary characters after Title and keywords. The image is:

unnecessary errors in the after title and keywords.png (189.03 KiB) Viewed 13581 times

The link for project files is:
https://github.com/zak100/TemporaryFiles

Somebody please guide me.

Zulfi.

[Johannes_B]

Write something in the author fields?