Please kindly contact your hosting service provider and ask them to whitelist the cURL access to community.theme.co
As mentioned in the article below:
The Email can be like this:
My WordPress installation is having a hard time making outbound HTTP requests. I'm using X theme and it makes a request to community.theme.co for setting up automatic updates.
Could you please do the following?
Ensure my site can reach this domain: community.theme.co
Ensure cURL is working, and allow_url_fopen is enabled.
Ensure PHP is configured with the latest CA Root Certificates.
Check into the error message above.
Please advise on anything you discover. Thank you.