OMG, I got the same email from
Shopify mailer.shopifythemelicense@gmail.com
"We’ve identified a pressing issue with your Shopify store’s theme license during our recent review. Unfortunately, your current theme’s license code is invalid, violating Shopify’s Terms of Service.
Using an unlicensed theme exposes your store to security vulnerabilities, performance disruptions, operational issues, loss of access to Shopify support, and potential store deactivation."
I am using old “Debut” … may be time to switch to a new one. I was so worry the whole day!