cURL error 28: Connection timeout after 10000 ms

I bought Alone Charity Wordpress theme in 2019 then it started giving me white screen, i tried to update wordpress but did not help So i’m now planing to do redevelopment.

When i put in the purchase code i get an error Something went wrong on get purchase information: cURL error 28: Connection timeout after 10000 ms. Is there any way this can be fixed or

Secondly, i would love to start wit offline development, Will this code still work ?

Thank you