Fixing Some Input Missing Error in User Post Queries

How to correct "some input missing"? it says "Find Recent Posts by User > posts > 0 is blank" Ive written in the prompt => if no result or blank use references from "Postitive Article Find" while the article is available its still say input missing ive tried => if "Find Recent Posts by User > posts > 0 is blank" use references from "Postitive Article Find" still not working, pls advise https://app.clay.com/workspaces/429077/tables/t_nPj8Dx7rBGxF/views/gv_uganQD47Nm3w