Hell Basanti,
Welcome to the Community. I'll be happy to steer you in the right direction so you can have the error issue addressed in a timely manner.
The error you've described is shown when your QB account subscription is about to expire. I recommend checking your billing and subscription info using the Customer Account Maintenance Portal. You can manage your QuickBooks Desktop account in one place with the Customer Account Maintenance Portal (CAMPs). You can access CAMPS by visiting camps.intuit.com.
In case you need additional assistance, I recommend getting in touch with our support team. You can reach out to our support team by dialing 1-855-253-1536. To find out more about our hours and other contact methods, please follow this link here: Contact QuickBooks Support.
Feel free to keep me posted on how you make out. I'll be on standby.
