Fixes ServerPortalComponent spamming exceptions and crashing server if spawned manually.

Also makes the prototype abstract because it doesn't work straight up.

Content.Server/GameObjects/Components/Movement/ServerPortalComponent.cs

@@ -193,9 +193,11 @@ namespace Content.Server.GameObjects.Components.Movement
 
         public void TryPortalEntity(IEntity entity)
         {
-
-            if (!immuneEntities.Contains(entity))
+            if (immuneEntities.Contains(entity) || _connectingTeleporter == null)
             {
+                return;
+            }
+
             var position = _connectingTeleporter.Transform.GridPosition;
             var soundPlayer = EntitySystem.Get<AudioSystem>();
 
@@ -214,4 +216,3 @@ namespace Content.Server.GameObjects.Components.Movement
         }
     }
 }
-}

Resources/Prototypes/Entities/Items/teleporters.yml

@@ -48,6 +48,7 @@
 - type: entity
   name: Portal
   id: Portal
+  abstract: true
   description: "Portal to another location"
   components:
   - type: Collidable