Hi there @dzire2dzine,
I ran your site through debugger, and the site is currently using an alternate endpoint for Jetpack that seems to be okay as far as I can see.
You should be able to see your Jetpack settings from your WordPress.com dashboard. Can you confirm this to me?
Do you still see errors when checking any Jetpack settings from the wp-admin dashboard? If so, try cycling the Jetpack connection by deactivating Jetpack in your wp-admin dashboard at Plugins > Installed Plugins and then reactivating it and connecting to WordPress.com again.
If you still see errors, you can share screenshots of what you see if that helps. You can create screenshots using something like Snipboard or Imgur and post the link here.
If all looks fine, then you can set the alternate endpoint for all the other sites of yours and see how it goes. We’re happy to check them in detail to see how healthy the Jetpack connections are.
Hope that’s all clear! Let me know how you get on. Thanks!