Some states may not accept Federal Register alone. They will only accept your expired and auto-extended TPS EAD as a basis of license renewal, if you show them the I-797 that you got after applying for the new EAD. They need proof that you have reapplied for a new TPS EAD. You should then be able to get a license until at least Dec 2018 and when your new EAD arrives, apply for another license until June 2019. Just make sure to take your TPS and EAD I-797 notices with you to the DMV.