When I load both doclicense and changes the resulting PDF is incomplete but I get no error message using pdflatex.
Example:
\documentclass{article}
\usepackage[type={CC},modifier={by},version={4.0}]{doclicense}
\usepackage[commandnameprefix=ifneeded]{changes}
\begin{document}
\section{Introduction}
This is the introduction.
\added[comment={This is a comment}]{New text}
\highlight{Highlight me}
\comment{comment me}
\section{Can you see this?}
Example text.
\end{document}
The PDF does not show the "Can you see this?" section. When I remove the inclusion of doclicense everything works. Any idea what is going on here?

Package changes Warning: Command comment is already defined, using chcomment on input line 783..\commentas defined by the verbatim packages suppresses the following text. In a current texlive I also get an error that hyperref is loaded to late, and had to load it before doclicense.