I have the following MWE (sorry for a long preamble, no longer know which are essential, taken from a larger document)
\PassOptionsToPackage{table}{xcolor}
\documentclass[xcolor=dvipsnames]{beamer}
\usepackage{graphicx}
\usepackage{tikz}
\usetikzlibrary{arrows,automata}
\usepackage{relsize}
%\tikzset{fontscale/.style = {font=\relsize{#1}}}
\usepackage{tikzscale}
\usetikzlibrary{backgrounds,shadings,shadows,shapes,chains,calc,positioning,decorations.pathreplacing}
\usetikzlibrary{shapes,chains,calc,positioning,decorations.pathreplacing}
\usetikzlibrary{arrows.meta}
\usepackage{comment}
\usepackage{tcolorbox}
%\captionsetup[figure]{labelfont={bf},name={Fig.},labelsep=period}
\usetikzlibrary{calc,arrows,decorations.pathmorphing,intersections}
\usetikzlibrary{patterns}
\usetikzlibrary{matrix,calc,shapes}
\tikzset{
trnode/.style = {shape=circle,
draw, anchor=center,
text width=1em, align=center,
inner sep=1ex},
treenode/.style = {shape=rectangle, rounded corners,
draw, anchor=center,
text width=8em, align=center,
top color=sidewalk, bottom color=goldenAfternoon,
inner sep=1ex},
mynode/.style = {shape=rectangle, rounded corners,
draw, anchor=center,
text width=2em, align=left,
top color=sidewalk, bottom color=goldenAfternoon,
},
decision/.style = {treenode, diamond, inner sep=0pt},
root/.style = {treenode, font=\Large, bottom color=burgundy},
env/.style = {treenode, font=\ttfamily\normalsize},
finish/.style = {mynode, bottom color=burgundy},
dummy/.style = {circle,draw},
whiteNode/.style= {trnode, top color = white, bottom color = white},
blackNode/.style= {trnode, draw,pattern = north west lines, pattern color=goldenAfternoon}
}
\definecolor{burgundy}{HTML}{882426}
\definecolor{sidewalk}{HTML}{CDBEA7}
\definecolor{cinder}{HTML}{323030}
\definecolor{goldenAfternoon}{HTML}{C29545}
\tikzset{onslide/.code args={<#1>#2}{%
\only<#1>{\pgfkeysalso{#2}}
}}
\tikzstyle{highlight}=[burgundy,ultra thick]
\edef\sizetape{0.7cm}
\begin{document}
\begin{frame}{Frame 1}
\begin{figure}
%\begin{tikzpicture}[remember picture,overlay,level/.style={sibling distance=60mm/#1}]
\begin{tikzpicture}[level/.style={sibling distance=60mm/####1}]
\tikzstyle{tmtape}=[decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt},draw,minimum size={\sizetape},thick]
\tikzstyle{tmtap}=[draw,minimum size={\sizetape},black!50]
\begin{scope}
\node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v0){\texttt{1}}
child {node [circle, decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v1) {\texttt{2}}
child {node [circle, decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v3) {\texttt{3}}
child {node [circle, decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw] (v9) {\scriptsize{\texttt{4}}}}
child {node [circle, decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v8) {\texttt{5}}}
}
child {node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw] (v4) {\scriptsize{\texttt{6}}}}
}
child {node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v2) {\texttt{7}}
child {node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw] (v5) {\scriptsize{\texttt{8}}}
child {node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw] (v7) {\scriptsize{\texttt{9}}}}}
child {node [circle,decorate, decoration={random steps,segment length=0.8pt,amplitude=0.2pt}, draw,very thick,color=burgundy] (v6) {\texttt{10}}}
};
\path[draw,very thick] (v0) -- (v1);
\path[draw,very thick] (v1) -- (v3);
\path[draw,very thick,color=burgundy] (v3) -- (v8);
%\path[draw,very thick] (v2) -- (v5);
%\path[draw,very thick] (v5) -- (v7);
%\path[draw,very thick] (v3) -- (v9);
\path[draw,very thick,color=burgundy] (v2) -- (v6);
\path[draw,very thick,color=burgundy] (v2) -- (v0);
%\path[draw,very thick] (v1) -- (v4);
\node[xshift=0.2cm,yshift=0.2cm] (w0) at (v0.north east) {\textit{-1}};
\node[xshift=0.2cm,yshift=0.2cm] (w8) at (v8.north east) {\textit{3}};
\node[xshift=0.2cm,yshift=0.2cm] (w3) at (v3.east) {\textit{9}};
\node[xshift=-0.2cm,yshift=0.2cm] (w1) at (v1.west) {\textit{-17}};
\node[xshift=0.2cm,yshift=0.2cm] (w2) at (v2.north east) {\textit{13}};
\node[xshift=0.2cm,yshift=0.2cm] (w6) at (v6.north east) {\textit{-2}};
\end{scope}
\begin{scope}[shift={($(v1.south)+(1,-4.5)$)},start chain=1 going right, node distance = 3.55mm]
\node [on chain=1,tmtape] (am17) {\texttt{-17}};
\node [on chain=1,tmtape] (am2) {\texttt{-2}};
\node [on chain=1,tmtape] (am1) {\texttt{-1}};
\node [on chain=1,tmtape] (a3) {\texttt{3}};
\node [on chain=1,tmtape] (a9) {\texttt{9}};
\node [on chain=1,tmtape] (a13) {\texttt{13}};
\coordinate (X) at ($(a13.south east)+(1,-1)$);
%\draw [decorate, decoration={brace,amplitude=10pt,mirror,raise=4pt},very thick,yshift=-2cm] (a8l.south west) -- (a6f.south east)
% node[midway,yshift=-0.85cm] (hp0) {\footnotesize{\texttt{8-to-6 path}}};
%\draw [decorate, decoration={brace,amplitude=10pt,raise=4pt},very thick,yshift=-2cm] (a5f.north west) -- (a5l.north east)
% node[midway,yshift=0.85cm] (hp1) {\footnotesize{\texttt{omitted vertices}}};
\path [draw,dotted,thick,->,out=0,in=-45] (w8) -- ($(a3.north west)+(-0.07,0.07)$);
\draw [dotted,thick,->,bend right=90,in=-90,out=0] (w6.south) ..controls (X) .. ($(am2.south east)+(0.07,-0.07)$);
\end{scope}
\end{tikzpicture}
%\caption{Path median query example.}
%\label{fig02}
\end{figure}
\end{frame}
\end{document}
Essentially, I would like to highlight certain edges in the next slide, and am using an answer provided elsewhere in TeX.SO, but the problem is really in the scope feature of TikZ: I get the following error 
Is there some incompatibility of scopes with Beamer?
scopeinbeamer. – Zarko May 07 '18 at 18:07