Summary

None of the users can create a new Team on the site and are receiving the below error when trying to create the Team.

Environment

All the Jira Cloud sites. 

Diagnosis

The below error is observed in Browser Network logs. 

{
"messages":
 ["User cannot access team"]

}

Cause

Verify the Any domain setting under User access settings in the Organization. If all the products in the organization are open(Admin approval not required for Any domain setting), it's considered that none of the users have access to the organization.
Thus none of the users on the site will be allowed to create Teams in the site. 

Reference: Control how users get access to products

Solution

Ensure that the users have access to at least one non-open product in the Organization.
To achieve this, update the Any domain setting under User access settings in the Organization and ensure that the  Admin Approval checkbox is checked. 

Reference:  Visibility of Atlassian teams information