Long title in tikzposter

The problem is that tikzposter puts the title inside a \scalebox thus preventing line breaks. You can recover line breaking placing your title inside a \parbox:

\documentclass{tikzposter}

\title{\parbox{\linewidth}{\centering This is a really  really  really  really  really  really  really  really  really  long title for a poster}}
\institute{The Institute}
\author{The Author}
\titlegraphic{Logo}
\usetheme{Basic}

\begin{document}

\maketitle
\block{BlocktitleA}{Blocktext}
\begin{columns}
\column{0.3}
\block{BlocktitleB}{Blocktext}
\column{0.7}
\block{BlocktitleC}{Blocktext}
\note{Notetext}
\end{columns}

\end{document}