This is not an error message but a reminder of your subscription end. The Error Code: 1524 appears when your product subscription expires. The subscription for all Stellar software products starts from the day you order the software and ends one year thereafter.
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Error Code: 1524
App: …….
How to Resolve Error Code 1524
To resolve or avoid error code 1524, just renew your subscription and continue using the software.
If you are unable to activate the software and experiencing this activation error, please visit our activation assistant page. You may also raise a ticket ,support team will help you activate the software and resolve the error at the earliest.