Some items were stolen from the fridge because PreventLooting doesn't lock it right now. The /box command also won't recognize the fridge anymore to see who it was.

Hey there,
over in the Carbon Discord a user named snapple has provided a solution for the fridge not being recognized anymore. It is a simple edit in the plugin source code. Look for this passage

private bool IsValidType(BaseEntity entity) => !entity.GetComponent<LootContainer>() && (entity is StorageContainer || entity is MiningQuarry || entity is ResourceExtractorFuelStorage || entity is BasePlayer);​

and change it like so

private bool IsValidType(BaseEntity entity) => !entity.GetComponent<LootContainer>() && (entity is StorageContainer || entity is MiningQuarry || entity is ResourceExtractorFuelStorage || entity is BasePlayer || entity is Fridge);

See that "entity is Fridge" has been added to the list for valid entities. Reload the BoxLooters plugin. The fridge should now be recognized. Works fine for me.