Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
Oops, indeed, I was running the sample from the wrong directory.
I finally made it work. I do not know exactly what I did, because I tried so many things, but I believe the internal server error was related to permissions.