Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 15000018473, position: 1, art_type: 1, thumbs_up: 37, thumbs_down: 21, hits: 12430, solution_folder_meta_id: 15000014175, account_id: 851581, created_at: "2018-12-03 09:40:59.000000000 +0100", updated_at: "2025-10-14 09:51:32.000000000 +0200", available: "48", draft_present: "0", published: "48", outdated: "16">