I just had this happen to me mid session. Random Pace error notice and My license disappeared after updating to 2020.9 and opening a project. the only one that shows is one that says it expired in April of 2020, which my plan expires April 2021. I have submitted a ticket but hopefully posting here will speed that process since I have a deadline to meet and now cant use pro tools at all.
edit 1:
I went into my Avid Link and noticed there was a redeem code for "SW DL,UPG/SUP PRO TOOLS PER V2" I activated it....and nothing changed. It did not deposit or update my iLok account and now shows a random product in my products page.