the problem of struct i find the soluction
i create a class and create a struct inside
like this
USTRUCT(BlueprintType)
struct Finventoryslot : public FTableRowBase
{
GENERATED_BODY()
public:
UPROPERTY(EditAnywhere, BlueprintReadWrite)
TSubclassOf<class AMasterItem> itemClass;
UPROPERTY(EditAnywhere, BlueprintReadWrite)
int32 Amount;
};