Hi folks.
It’s impossible for us to check what’s going on without knowing what sites you’re speaking of, and also without knowing if you’re speaking of the full stats page which lives at https://WordPress.com/stats, or the legacy stats page at WP-Admin ->Jetpack ->Site stats, or wp-admin/admin.php?page=stats
Can you please provide that info, and we can take a look. Also let us know what browser you’re using, including the browser version number. Does clearing the browser cache, disabling browser add-ons, or using a different browser make any difference?
For what it’s worth, for my sites on WordPress 5.3 and Jetpack 7.9 I can access stats normally at both locations, in Firefox and Chrome on Windows, and both of those along with Safari on MacOS.
@khahina
Nota: web site is always in WP 5.2
Did the last Jetpack version not full compatible with WP 5.2 ?
The current version of WordPress is 5.3. Jetpack 7.9 is fully compatible with WordPress 5.3, and it should also still work on WordPress 5.2.
That said, WordPress 5.2 came out in May, and there has been four minor releases since then fixing various bugs and security issues. It’s recommended that you update to the newest version as soon as possible, both to keep your site secure and to prevent conflicts with any plugins you are using.