Sorry for delay. After latest upgrade error is gone, so no more testing needed. Thanks!
Can I send it to you privately? I will send you theme and XML for data import.
Hi, it is commercial theme so my company’s policy is not to give code away, but it is one page theme. Error notice is present only in front page.
Front page contains only from pages ( post_type = page ) and I am populating them depending on menu items, so, when plugin is loaded, there are no $post data.
My best advice is to not trust any developer to be sane and check in if ( is_front_page() ) { block global $post is null or object.