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Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 69000800023, position: 1, art_type: 1, thumbs_up: 25, thumbs_down: 21, hits: 4941, solution_folder_meta_id: 69000655186, account_id: 2016586, created_at: "2022-01-20 23:05:47", updated_at: "2025-04-24 13:29:47", available: "16432", draft_present: "0", published: "16432", outdated: "0">