I am having the same problem with my Android phone, Samsung Galaxy S20 and Avast Ultimate multi device subscription. I have 4 of 10 devices activated, the subscription is good through November 23, 2023. I get subscription not found when I try to restore from Avast account or use an activation code. I am logged in to the correct account and have verified and re-verified the code. All I get is the message “Sorry, activation failed”, go back and try again. I have copied the code and pasted it and it still does not work.