Issue with access token after 2 days works

[Pavlo9999]

/usr/local/rvm/gems/ruby-2.6.3/gems/signet-0.8.1/lib/signet/oauth_2/client.rb:988:in `fetch_access_token': Authorization failed. Server message: (Signet::AuthorizationError) { "error": "invalid_grant", "error_description": "Token has been expired or revoked." }