Missing/Broken pages

This author had a page, but now it displays an error (with either syntax)...

www.listal.com/jason-mattera
www.listal.com/author/jason-mattera

He's written several books which are in the Listal database, such as:

www.listal.com/book/hollywood-hypocrites
www.listal.com/book/crapitalism-liberals-make-millions-swiping

I don't know what happened, anyway I've just created his profile by importing the IMDb page.