Missing control sequence inserted. \end{tabulary} error in revtex4-2 template aps

I suggest the new and much more flexible tabularray package instead.

Also don't scale content which contains text, this will result in an suboptimal result. If in your real document, you must make the table smaller, use a smaller font size instead of scaling it with adjustbox.

(you should really clean up your preamble and remove duplicates and outdated packages)

\documentclass[aps,pra,twocolumn,floatfix,footinbib,notitlepage,superscriptaddress,groupaddress,showpacs]{revtex4-2}
\usepackage{graphicx,graphics,times,bm,bbm,bbold,amssymb,amsmath,amsfonts,dsfont,hyperref,mathrsfs,color,caption,subcaption,cancel}
\usepackage{adjustbox}
\usepackage{tabularx}
\usepackage{tabulary}
\usepackage{graphicx}% Include figure files
\usepackage{dcolumn}% Align table columns on decimal point
\usepackage{bm}


\usepackage{tabularray}
\UseTblrLibrary{booktabs}

\begin{document}
    
    \preprint{AIP/123-QED}
    
    %\title[Sample title]{Sample Title:\\with Forced Linebreak\footnote{Error!}}% Force line breaks with \\
    \title[]
    
    \author{}
    \affiliation{}
    
    \author{}
    \affiliation{}
    \email{}

    
    \date{\today}
    \begin{abstract}
        
    \end{abstract}
    
%   \keywords{}
%   \maketitle
    
    \section{Introduction}\label{sec:introduction}

    \section{Theoretical Analysis}
    
    \begin{table}[h!]
        \centering
        \caption{List of Parameters Values }
        \label{table:1}
%        \begin{adjustbox}{max width=8.5 cm}
            \begin{tblr}{width=0.8\linewidth,colspec={@{}X[l]X[l]X[r]@{}}}
                \toprule
                \textbf{Parameters} & \textbf{Values} & \textbf{Units}\\
                \midrule
                $\lambda$   &  1550            & $nm$ \\        
                \bottomrule     
            \end{tblr}
%        \end{adjustbox} 
    \end{table}

\end{document}
%
% ****** End of file aipsamp.tex ******