Another most important reason for the issue is if you have activated the same license to another site then you will face this error. So you have to keep the license from that site deactivated if you delete the site already before deactivating it then you must face this issue.

In that case, open a ticket on our support system support.smartdatasoft.com . Let us know about this we will delete the license from the other deleted site.

Our license is a one-time use license which means you can only use the license on one site at a time so using one license and keep it active on multiple sites will cause issues a lot of issues for you.