After installing Magix Movie Studio 2023 Platinum, I've started the program, filled out my email and the serial number I've received and got twice a "check" as confirmation. After pressing the button "Activation & register immediately online" I receive a message Error code -14, saying that I use the wrong serial, whch is not the case.

The product was bought online and the download link with the serial came via email.

So, now what?