Hotfix #10114 (#10431)

Content.Shared/Foldable/SharedFoldableSystem.cs

@@ -1,6 +1,7 @@
 using JetBrains.Annotations;
 using Robust.Shared.Containers;
 using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.Foldable;
 
@@ -57,6 +58,7 @@ public abstract class SharedFoldableSystem : EntitySystem
             args.Cancel();
     }
 
+    [Serializable, NetSerializable]
     public enum FoldedVisuals : byte
     {
         State