error : In MyBlueprintFunctionLibrary: Unrecognized type 'MyCameraInfo'

i have defined a c++ class named as MyInfo.Then in another c++ class named as MyBlueprintFunctionLibrary i define a function

UFUNCTION(BlueprintCallable, Category = “My”)
static TArray<MyInfo> SelectValues(FString selectStr);

error : In MyBlueprintFunctionLibrary: Unrecognized type ‘MyCameraInfo’

how to solve it? anyone know?