What is the test for reviewing for harmlessness a preserved error in the case of a guilty plea, where the error is the government's failure to charge or prove to a jury beyond a reasonable doubt a fact necessary to the punishment, in violation of the Fifth and Sixth Amendments?

Whether harmless-error review applies to preserved errors involving the government's failure to charge or prove to a jury beyond a reasonable doubt a fact necessary to punishment, in violation of the Fifth and Sixth Amendments in the context of a guilty plea