导入外部 tex 表时出错

Question

每个人

我正在尝试将外部表导入到我的主要 tex 文件中，但是当我尝试编译我的文档时出现错误“无效的 UTF-8 字节序列”。

我的main.tex样子是这样的：

    \documentclass[12pt]{article}
    \usepackage[right=1.25in,left=1.25in,top=1.1in,bottom=1.1in]{geometry}
    \usepackage{hyperref}
    \hypersetup{colorlinks, citecolor=blue, filecolor=blue, linkcolor=blue, urlcolor=blue}
    \usepackage{graphicx}
    \usepackage{url}
    \usepackage[round]{natbib}
    \usepackage{amsmath,amsthm} 
    \usepackage{engord}
    \usepackage{float}
    \usepackage{subfig}
    \usepackage{pdflscape}
    \usepackage{booktabs}
    \usepackage{pgfplots}
    \usepackage{threeparttable}
    \pgfplotsset{compat=1.14}
    \pgfplotsset{every axis label/.append style={font=\tiny}}
    \usepackage[labelsep=period]{caption} %% This switches "Table 1: Title" to "Table 1. Title"
    
    \usepackage{amssymb} %% Necessary, just for the \checkmark command  in tables.
    \usepackage{multirow} %% Necessary if we are doing tables in LaTeX
    \usepackage{xr}
    \usepackage{adjustbox}
    \usepackage[portuguese]{babel}
    \usepackage[T1]{fontenc}       
    \usepackage[utf8]{inputenc}        
    \usepackage{setspace}
    \onehalfspacing        
    \usepackage{sectsty}
    \sectionfont{\large}
    \subsectionfont{\normalsize}
    \subsubsectionfont{\normalsize}        
   \newcommand{\specialcell}[2][c]{\begin{tabular}[#1]{@{}l@{}}#2\end{tabular}}
    
   

\section{Introduction\label{sec:introduction}}
        
        \input{external_table.tex}

    
    \end{document}

我的external_table.tex样子

\begin{table}[h]
   \centering
   \begin{adjustbox}{width = \textwidth, center}
      \begin{threeparttable}[b]
         \caption{\label{IV_wage_1} Title  (Dep. Var: y)}
         \bigskip
         \begin{tabular}{lccc}
            \toprule
                                                      & Educação1     & Educação2  & Educação3 \\   
                                                      & (1)              & (2)             & (3)\\  
            \midrule 
            X                                       & 0.379$^{*}$      & 0.639$^{**}$    & 0.320\\   
                                                      & (0.193)          & (0.296)         & (0.201)\\   
            1o Estágio                                & -0.097***(0.026) & -0.09***(0.026) & -0.094***(0.026)\\  
             \\
            Observations                              & 231              & 215             & 231\\  
            F-test (1st stage) & 12.7             & 9.02            & 9.82\\  
             \\
            ano fixed effects                         & $\checkmark$     & $\checkmark$    & $\checkmark$\\   
            UF fixed effects                          & $\checkmark$     & $\checkmark$    & $\checkmark$\\   
            \bottomrule
         \end{tabular}
         
      \end{threeparttable}
   \end{adjustbox}
\end{table}

有什么办法可以避免这个错误并直接导入表？