为什么我会收到引用消息?

为什么我会收到引用消息?

这是主文件:

\documentclass[11pt,fleqn,twoside]{report}

\usepackage[utf8]{inputenc}
\usepackage{csquotes}
\usepackage{graphicx}
\usepackage{tikz} 
\setcounter{tocdepth}{4}
\setcounter{secnumdepth}{4}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{latexsym}
\usepackage{floatrow}
\usepackage{amsthm,amssymb}
\usetikzlibrary{arrows.meta,calc,positioning}
\tikzset{block/.style={draw,thick,text width=2cm,minimum height=1cm,align=center},
    line/.style={-latex}
}
\usepackage{amsmath}
\usepackage{float}
\usepackage{morefloats}
\usepackage{longtable}
\usepackage{IEEEtrantools}
\usepackage{lineno,hyperref}
\usepackage{mathtools}
\modulolinenumbers[5]
\usepackage{makecell}
\usepackage{placeins}
\usepackage[english]{babel}
\usepackage{float}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage[figuresright]{rotating}
\usepackage{epstopdf}
\usepackage{xcolor}
\usepackage{xspace}
\usepackage{array}
\usepackage[T1]{fontenc}
\usepackage{enumerate}
\usepackage{parskip}
\usepackage{eucal}
\usepackage[boxruled,algochapter]{algorithm2e}
\usepackage{alphabeta}
\usepackage{subcaption}
\usepackage{pdflscape}
\usepackage{lipsum}
\usepackage{calc}
\newcommand\blfootnote[1]{%
  \begingroup
  \renewcommand\thefootnote{}\footnote{#1}%
  \addtocounter{footnote}{-1}%
  \endgroup
}
%--------------------------------------

\input{structure}
\begin{document}

%----------------------------------------
%   TITLE PAGE
%--------------------------------------

\begingroup
\thispagestyle{empty}
\begin{tikzpicture}[remember picture,overlay]
\end{tikzpicture}
\vfill
\endgroup
%--------------------------------------
%   TABLE OF CONTENTS
%---------------------------------------

\chapterimage{chapter_head_1.pdf} 

\pagestyle{empty} 
\tableofcontents
    \listoftables
    \listoffigures
\cleardoublepage 
\pagestyle{fancy} 
\pagenumbering{arabic}

\part{Part One}
%----------------------------------------
%   CHAPTER 1
%---------------------------------------

\chapterimage{chapter_head_1.pdf}
\chapter{Chapter 1}
\input{ch1.tex}

% more chapters are included

%--------------------------------------
%   BIBLIOGRAPHY
%----------------------------------------
\chapterimage{chapter_head_1.pdf}
\chapter*{Bibliography}
\addcontentsline{toc}{chapter}{\textcolor{blue}{Bibliography}}
\bibliographystyle{abbrvnat}
\addbibresource{References.bib} 
\printbibliography

%---------------------------------------
%   INDEX
%----------------------------------------

\cleardoublepage
\phantomsection
\setlength{\columnsep}{0.75cm}
\addcontentsline{toc}{chapter}{\textcolor{blue}{Index}}
\printindex

%---------------------------------------

\end{document}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

为什么我会收到多个类似下面的引用相关消息?此外,文档也没有显示。我提供了主文件和结构文件以供参考。我在 overleaf 中使用 pdfLaTex 进行了编译。

  1. 第 2 页上的引用‘1.1’在输入行 10 上未定义。&
  2. 命令@parboxrestore 已改变。

References.bib 中的典型条目

@book{1.1,
  title={Routing in the Internet},
  author={Huitema, Christian},
  year={1995},
  publisher={Prentice-Hall, Inc.}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

结构文件如下所示:

%-----------------------------------
%   VARIOUS REQUIRED PACKAGES AND CONFIGURATIONS
%--------------------------------

\usepackage[top=3cm,bottom=3cm,left=3cm,right=3cm,headsep=10pt,a4paper]{geometry} 
\usepackage{graphicx} 
\graphicspath{{Pictures/}} 
\usepackage{lipsum} 
\usepackage{tikz} 
\usepackage[english]{babel} 
\usepackage{enumitem} 
\setlist{nolistsep} 
\usepackage{booktabs} 
\usepackage{hyperref}
\usepackage{xcolor} 
\definecolor{blue}{RGB}{243,102,25} 
-------------------------------------------
%   FONTS
--------------------------------------------
\usepackage{avant} 
\usepackage{mathptmx} 
\usepackage{microtype}
\usepackage[T1]{fontenc} 

-----------------------------
%   BIBLIOGRAPHY AND INDEX
----------------------------------
\usepackage[style=numeric,citestyle=numeric,sorting=nyt,sortcites=true,autopunct=true,autolang=hyphen,hyperref=true,abbreviate=false,backref=true]{biblatex}
\addbibresource{References.bib} 
\defbibheading{bibempty}{}
\usepackage{calc} 
\usepackage{imakeidx} 
\makeindex 


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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