Jetpack admin errors

Hi,

Jetpack disconnects from my site automatically. Using 6.1 version with WordPress 4.9.5.

Found several errors in the jetpack admin area:
– /wp-json/jetpack/v4/rewind?_cacheBuster=1525358958762 (admin.js)
– /wp-json/jetpack/v4/site?_cacheBuster=1525358958780 (admin.js)
– /wp-json/jetpack/v4/site/features?_cacheBuster=1525358958781 (admin.js)
– /wp-json/jetpack/v4/tracking/settings?_cacheBuster=1525358958825 (admin.js)
– /wp-json/jetpack/v4/plans?_cacheBuster=1525358958781 (admin.js)
– /wp-json/jetpack/v4/plugins?_cacheBuster=1525358958769 (admin.js)
– /wp-json/jetpack/v4/jitm?message_path=wp%3Atoplevel_page_jetpack%3Aadmin_notices&query=page%253Djetpack&_wpnonce=f348ccbb16 (load-scripts.php/..)

AND

Failed to load resource: the server responded with a status of 403 ()
/wp-json/jetpack/v4/jitm?message_path=wp%3Aplugins%3Aadmin_notices&query=&_wpnonce=f348ccbb16

Any suggestions? Thanks in advance