On multisite installations the activation hook for new sites references a non-existing method StatifyBlacklist_Install::init_site().
Second issue is triggered on network wide activation. For compatibility with WP < 4.6 a fallback to wp_get_sites() is called, which generates an array of associative arrays, while get_sites() returns an array of WP_Site objects, hence $site['blog_id'] and $site->blog_id both fail in one case.
On multisite installations the activation hook for new sites references a non-existing method
StatifyBlacklist_Install::init_site().Second issue is triggered on network wide activation. For compatibility with WP < 4.6 a fallback to
wp_get_sites()is called, which generates an array of associative arrays, whileget_sites()returns an array ofWP_Siteobjects, hence$site['blog_id']and$site->blog_idboth fail in one case.