News show pro gk5 - K2 author source error

Hello,
I've installed mod_newsprogk5 and it works correctly for k2 articles, tags and categories, but when I set source= k2 authors it doesn't work.
It display this sql error:
SQL=SELECT c.id AS CID FROM c5d13_k2_categories AS c LEFT JOIN c5d13_k2_items AS content ON c.id = content.catid WHERE ( content.id = ) AND c.published = 1

I've joomla 3.2 and the latest version of gk5 with a joomlart template.
I've tried to install it also in a site with a gavick template and the error still remain.
I've a lot of k2 articles from different authors.
I think there is a bug. Will you help me?

Thank you,
Laura

Please try this fix →https://github.com/GavickPro/News-Show-Pro-GK5/commit/4a660653a9a535a08af5202e3c0140ae3a72f100 and let me know about results

Wonderful! it works!
Thank you so much,
Laura

Great, we will include this fix in next module version.