tikzposter + tikzscale 不工作？

Question

我已经开始使用 创建海报tikzposter，但在尝试使用时遇到了麻烦tikzscale。也就是说，虽然.log-file 告诉我

Package grfext Info: Graphics extension search list:

(grfext) [.tikz,.TIKZ,.TikZ,.pgf,.PGF,.png,.pdf,.jpg,.mps,.jpeg, .jbig2,.jb2,.PNG,.PDF,.JPG,.JPEG,.JBIG2,.JB2,.eps]

LaTeX Error: Unknown graphics extension: .tikz.当我尝试使用\includegraphics-file时，我得到了一个.tikz。以下 MWE 直接基于包附带的模板；我只添加了包、示例.tikz-file 和第一个块的内容。

%\RequirePackage{filecontents}% if really necessary

\begin{filecontents}{square.tikz}
\begin{tikzpicture}
\draw (-10,-10) rectangle (10,10);
\end{tikzpicture}
\end{filecontents}

\documentclass{tikzposter} %Options for format can be included here    
\usepackage{tikzscale}

% Title, Author, Institute
\title{Template Poster}
\author{Author(s)}
\institute{Institute}
\titlegraphic{LogoGraphic Inserted Here}

%Choose Layout
\usetheme{Default}

\begin{document}

% Title block with title, author, logo, etc.
\maketitle
\block{Basic Block}{%
\begin{tikzfigure}[Caption]
    \includegraphics[width=0.5\linewidth]{square.tikz}
\end{tikzfigure}
}
\begin{columns}

% FIRST column
\column{0.6}% Width set relative to text width

\block{Large Column}{Text\\Text\\Text Text Text}
\note{Note with default behavior}
\note[targetoffsetx=12cm, targetoffsety=-1cm, angle=20, rotate=25]
{Note \\ offset and rotated}

% First column - second block
\block{Block titles with enough text will automatically obey spacing requirements }
{Text\\Text}

% First column - third block
\block{Sample Block 4}{T\\E\\S\\T}

% SECOND column
\column{0.4}
%Second column with first block's top edge aligned with with previous column's top.

% Second column - first block
\block[titleleft]{Smaller Column}{Test}

% Second column - second block
\block[titlewidthscale=0.6, bodywidthscale=0.8]
{Variable width title}{Block with smaller width.}

% Second column - third block
\block{}{Block with no title}

% Second column - A collection of blocks in subcolumn environment.
\begin{subcolumns}
\subcolumn{0.27} \block{1}{First block.} \block{2}{Second block}
\subcolumn{0.4} \block{Sub-columns}{Sample subblocks\\Second subcolumn}
\subcolumn{0.33} \block{4}{Fourth} \block{}{Final Subcolumn block}
\end{subcolumns}

% Bottomblock
\block{Final Block in column}{
Sample block.
}
\end{columns}
\block[titleleft, titleoffsetx=2em, titleoffsety=1em, bodyoffsetx=2em,%
bodyoffsety=-2cm, roundedcorners=10, linewidth=0mm, titlewidthscale=0.7,%
bodywidthscale=0.9, bodyverticalshift=2cm, titleright]
{Block outside of Columns}{Along with several options enabled}

\end{document}