Activation transaction failed: Serial number not entitled to SOLIDWORKS 2025. Check that you have entered the correct serial number. For further support, contact your support representative. (3/0)

I had gotten all the way to the end of the Solidworks 2025 installation process, but then I got this error message trying to activate it:

Activation transaction failed: Serial number not entitled to SOLIDWORKS 2025. Check that you have entered the correct serial number. For further support, contact your support representative. (3/0)

How do I put in the CORRECT serial number, and how do I fix this issue?
 

Edu Installation Error