Transfering Adobe standard 2020 perpetual license to a new pc

One of my colleagues has an Adobe Standard 2020 perpetual license on her old laptop. She recently received a new laptop, and we're trying to transfer the license to the new device in these steps:

1-Signed out of Adobe on the old PC.

2-Signed into Adobe on the new PC.

3-When prompted, we entered the license key—but it keeps asking for the key in a loop.

Any suggestions on how to resolve this?