Registration question

I have finished registration procedure, but when I open wavelab soft ware, it still Jump out of a window to ask me input activation code.
Dose anyone can help me solve this question?
Thx~

You need to activate your Wavelab license in the the e-Licenser software that should be installed together with Wavelab. So open ‘e-Licenser Control Center’, click on ‘Enter Activation Code’ and add the license for Wavelab. This must be done with an active internet connection.

If you don’t have an e-Licenser you will need to purchase one from Amazon or your local supplier. FWIW
https://www.amazon.com/Steinberg-Key-License-Control-Device/dp/B0009TD5Z4/ref=sr_1_1?keywords=e-Licenser&qid=1570962403&sr=8-1

Unless it is Elements. Which, of course, the OP does not specify.