Error: Your license is not valid for RadSystems version 8.2.3

Questions
1

I just encountered this problem:
Error: Your license is not valid for RadSystems version 8.2.3
When I enter the license code I have the result is
Error Code: RSMBE404 When entering product key

Even though I have an invoice for purchasing this application. anyone experience the same thing? what is the solution?

2

Retry your activation.

3

Yes, I have obtained a new license code. The old license code cannot be used anymore.
From the information I got, there will be a subscription fee next year. Even though I bought a lifetime license.

Can you explain what that means?

4

Contact Radsystems Support to get more information.