activating licence and configure variations buttons issues

Hello,
I can’t activate the plugin license, I have the message indicating that the authentication is done but the message asking to activate the plugin still appears.
Moreover on the page https://villatheme.com/my-download/ you can’t see that the license is activated on my site.

I can’t manage to configure the design of the variation buttons. Any changes I make in the plugin configuration page don’t change anything on the product page.

There are icons that appear on the variation buttons, it looks like a display bug.

I can’t make the selected variation visible, for example adding an extra border when a variation is selected.

I need your help.
Thank you in advance.
Sincerely
Chris