Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 151000161292, position: 4, art_type: 1, thumbs_up: 2, thumbs_down: 0, hits: 0, solution_folder_meta_id: 151000551415, account_id: 2530655, created_at: "2023-10-01 15:08:22", updated_at: "2024-05-16 12:42:09", available: "274877906976", draft_present: nil, published: "274877906976", outdated: "0">