Draftsight reactivation does'nt work

Hello,

I use Draftsight on Ubuntu for a least 2 years, with no big problem but now I can't reactive the licence.

When I run Draftsight, the activation prompt is here and when I click on Activate (after fill in the input) I can see a message which says approwimatly "You need to reactivate Draftsight to use it"

And I don't have any mail in my mailboxes.