Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 63000263339, position: 6, art_type: 1, thumbs_up: 0, thumbs_down: 0, hits: 29, solution_folder_meta_id: 63000236652, account_id: 1543635, created_at: "2021-05-18 23:42:06", updated_at: "2022-07-01 10:35:18", available: "1028", draft_present: "0", published: "1028", outdated: "0">