Before proceeding with troubleshooting, it's prudent to check the Atlassian Statuspage https://status.atlassian.com/ to see if there are any ongoing incidents or maintenance affecting Jira Service Management or Confluence, as this could explain the issue. Else raise a ticket with atlassian support.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.