Hi @tag_webdev
I believe the issue is that your code is using $clientLink (an array) as a post object. The issue is with this line:
the_sub_field('client_link', $clientLink->ID);
I think it should be:
the_sub_field('client_link', $post->ID);
Just to make sure, the field named client_link is a sub field within a repeater and returns multiple posts? Does this post_object field allow multiple selections or just one?
Thanks
E