Thank you for the credentials, but sorry I was kicked out from your site and I can't login back. Although I saw this same error on your site;
Would you mind doing the solution provided in there? (e.g. Log in to your WordPress.com account. or deactivate the Jetpack plugin)
And did you contact your hosting regarding this?
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.
If not, please do so.
If all else fails, please do a testing for a plugin conflict. You can do this by deactivating all third-party plugins, and see if the problem remains. If it's fixed, you'll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Let us know how it goes,