I have noticed on error that is being caused on both of my instances of generatepres on author archive page.
when I visit author url for any user that does not have any posts written I get this error. But I do not see this error whenever that particular user has any number of posts assigned to his profie.
Below is the error message I see.
Notice: Undefined offset: 0 in /wp-includes/class-wp-query.php on line 3275
Please check the url too.