Theme cannot be activated

I bought the Gymster theme in 2020 and wanted to activate it on a new Wordpress website. Unfortunately this is not possible. Nothing happens. Even on the website on which the theme is activated, it cannot be deactivated. Unfortunately, nothing happens here either. In both cases, the spinner just spins. Can you please help me with this?
Many thanks in advance and best regards

Hello,

You will need to purchase another license if you wish to use the theme on a different website. Licenses only cover individual projects, even if that project is no longer in operation. Thanks!