Sorry, you have reached your activation limit for this license

If you deleted plugin data or you changed site URL (e.g. from non-www to www) without deactivate license before, the license activation counter keeps in one (or three), that’s your license activation limit.

To solve the problem, Go to My Account → Licenses, click on “Manage sites” and delete current site. After doing so, you will be able to activate your license again from: Your site → wp-admin → WooCommerce →Settings → Zone Pricing → License.