License problem - [API_ERROR] Error response:{}

Hello,
I want to activate the personal edition license manually at Unity - Activation,
When I upload .alf file, the website has this error [API_ERROR] Error response:{}.
Does anyone know how to solve this situation?

Hi there,

unfortunately we can’t help you with license issues here on the forums.
Could you please open a ticket here? The customer service team will be able to help you out.

Wishing you the best,
Seb

Thank you.