Raeken
2
Hello!
You can contact support: https://support.avast.com/en-us/contact/
But, keep in mind that they can take a few days to handle your situation.
Is your Secureline the built in (in Avast Antivirus) or standalone version?
Did you try to download your license again and insert it again? (you’ll find it here: https://my.avast.com/en-us/#licenses )
Good luck! 