有人知道我为什么会收到此错误以及如何修复它吗？“\end{align}”行中甚至没有“-”？此外，我之前几行的结构完全相同，但它没有抛出错误。
\documentclass[11pt,
paper=a4,
bibliography=totocnumbered,
captions=tableheading,
BCOR=10mm
]{scrreprt}
\setcounter{tocdepth}{4}
\setcounter{secnumdepth}{4}
\usepackage[utf8]{inputenc}
\usepackage[onehalfspacing]{setspace}
\usepackage{csquotes} % Context sensitive quotation.
\usepackage{amsmath} % Standard math.
\usepackage{etoolbox}
\patchcmd{\subequations}{\def\theequation{\theparentequation\alph{equation}}}%
{\def\theequation{\theparentequation.\arabic{equation}}}{}{}
\usepackage{amsthm} % Math theorems.
\usepackage{amssymb} % More math symbols.
\usepackage{efbox}
\usepackage[sb,osf]{libertine}
\usepackage{libertinust1math}
\theoremstyle{definition}
\newtheorem{definition}{Definition}[chapter]
\usepackage[section]{placeins} % Keep floats in the section they were defined in.
\usepackage{tabularx}
\usepackage{booktabs} % Scientific table styling.
\usepackage{floatrow} % Option for keeping floats in the place they were defined in the code.
\floatsetup[table]{style=plaintop}
%\usepackage{hyperref} % Hyperlinks.
\usepackage[colorlinks=true]{hyperref}
\hypersetup{linkcolor=uos-red-full,citecolor=uos-red-full,filecolor=black,urlcolor=uos-red-full} % specs of hyperlinks
\usepackage[all]{nowidow} % Prevent widows and orphans.
\usepackage{xstring} % logic string operations
\usepackage{bbm} % \mathbb on numerals.
\usepackage{csquotes}
\usepackage{mathtools}
\usepackage{chngcntr}
\counterwithout{equation}{chapter}
\usepackage[ruled,vlined]{algorithm2e} % Pseudocode
\usepackage{scrhack} % Make warning go away.
\usepackage{graphicx}
\usepackage{subfig}
%\usepackage{subcaption} % Subfigures with subcaptions.
\usepackage{authoraftertitle} % Make author, etc., available after \maketitle
\usepackage{listofitems}
\usepackage{blindtext} % Placeholder text.
\usepackage[automake, nopostdot, nonumberlist, acronym]{glossaries} % glossary for definitions and acronyms, without dot after entry and page reference
\makeglossaries % Generate the glossary
\usepackage{uoslogo}
\usepackage[backend=biber,
bibstyle=apa,
citestyle=apa,
%maxnames=2,
maxbibnames=99,
uniquelist=false]{biblatex}
\addbibresource{references.bib}
\DeclareStyleSourcemap{
\maps[datatype=bibtex, overwrite=true]{
\map{
\step[fieldsource=url, final]
\step[typesource=misc, typetarget=online]
}
\map{
\step[typesource=misc, typetarget=patent, final]
\step[fieldsource=institution, final]
\step[fieldset=holder, origfieldval]
}
}
}
%\linespread{1.5} % set line spacing
\usepackage{listings} % rendering program code
\lstset{% general command to set parameter(s)
basicstyle=\ttfamily\color{grey}, % print whole listing small
keywordstyle=\color{black}\bfseries\underbar,
% underlined bold black keywords
identifierstyle=, % nothing happens
commentstyle=\color{white}, % white comments
stringstyle=\ttfamily, % typewriter type for strings
showstringspaces=false} % no special string spaces
\DeclareFontFamily{U}{mathx}{\hyphenchar\font45}
\DeclareFontShape{U}{mathx}{m}{n}{
<5> <6> <7> <8> <9> <10>
<10.95> <12> <14.4> <17.28> <20.74> <24.88>
mathx10
}{}
\DeclareSymbolFont{mathx}{U}{mathx}{m}{n}
\DeclareFontSubstitution{U}{mathx}{m}{n}
\DeclareMathSymbol{\bigtimes}{1}{mathx}{"91}
\begin{document}
...
\begin{subequations}
\begin{align}
MAPE &= mean(|p_{t}|) \\
MdAPE &= median(|p_{t}|) \\
RMSPE &= \sqrt{mean(|p^{2}_{t}|)} \\
RMdSPE & = \sqrt{median(|p^{2}_{t}|)} \\
sMAPE &= mean(\frac{200 | Y_{t} − F_{t} |} {(Y_{t} + F_{t})})\\
sMdAPE &= median(\frac{200 | Y_{t} − F_{t} |} {(Y_{t} + F_{t})})
\end{align}
\end{subequations}
\end{document}
错误：
Package inputenc Error: Unicode character − (U+2212)
./main.tex, 404
(inputenc) not set up for use with LaTeX.
See the inputenc package documentation for explanation.
Type H <return> for immediate help.
...
l.404 \end{align}
You may provide a definition with
\DeclareUnicodeCharacter