If you have an expired campaign, this means that your account does not have enough website slots to keep the campaigns running. Your URL slots will be downgraded if you did not pay for the booster packs or upgrade plan for the month. You can keep the campaigns active again by upgrading your plan and purchasing extra website slots again.
An expired campaign means that the website slot has expired due to a recent downgrade of your account or the expiration of a booster pack.
You do not have enough website slots to resume the campaign. You will need to upgrade your plan or buy extra website slots again.