Why does the error "Your session has expired." on wordpress?

Question

PHP

Good afternoon.

There is a wordpress multisite site. When saving posts on the main domain, everything works fine (records are saved, work is not broken). When saving records (post, page) on a subdomain, I am redirected to the page https://subdomain.main-domain.ru/wp-admin/post.php . The page itself says "Your session has expired.".

Tried to re-login, work through another browser, clear the cache, disable recently installed plugins - nothing helps. On the Internet I could not find a similar problem with other users. Have you encountered such a problem? I would be glad to hear from you a possible solution to this problem or its sources.

Answer 1

xs, mb time zones are different set in the settings? check