どんなことでお困りですか？

Liquid error: Solution::ArticleMeta#visible? delegated to solution_folder_meta.visible?, but solution_folder_meta is nil: #<Solution::ArticleMeta id: 68000022356, position: 2, art_type: 1, thumbs_up: 0, thumbs_down: 0, hits: 4, solution_folder_meta_id: 68000059144, account_id: 4883954, created_at: "2026-04-24 11:15:28.000000000 +0900", updated_at: "2026-06-14 17:19:57.000000000 +0900", available: "4429234208", draft_present: "0", published: "4429234208", outdated: "0">