documentclass[10pt]{article}
usepackage{pstricks}
begin{document}
section{Start}
Here we go.
end{document}

/usr/local/texlive/2019/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Illeg
al unit of measure (pt inserted).
<to be read again>

Runaway argument?
tx@Dict begin Rand Rand Rand endp@ <z@ 0@@ @@drv ifx @@cls @empty ETC.
/usr/local/texlive/2019/texmf-dist/tex/generic/pstricks/pstricks.tex:667: Parag
raph ended before c@lor@@rgb was complete.
<to be read again>
                   par
l.667