Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 33000111408, position: 3, art_type: 1, thumbs_up: 11, thumbs_down: 4, hits: 1729, solution_folder_meta_id: 33000219057, account_id: 704202, created_at: "2017-08-10 12:46:31", updated_at: "2025-04-29 12:57:32", available: "2621541", draft_present: "0", published: "2621541", outdated: "0">