An Error message "Security constraints prevent access to requested page" shows upon login to the instance for non admin usersIssue When a regular user logs in to the instance, they get an error message "Security constraints prevent access to requested page" when landing on https://<instance-name>.service-now.com/navpage.do But by reloading the page or clicking Enter on the URL address, they can login without any error. Steps to Reproduce Open the login page of the affected instanceEnter the credentials and press "login"The URL changes to https://<instance-name>.service-now.com/navpage.do, but the above-mentioned error message appearsReload the page, and notice that the native UI loads as expectedResolutionUsually, after every login, every logged-in user needs to access the page "login_redirect". There is any OOB UI page type read ACL in the instance which might be restricting the user to access the "login_redirect" page after logging in. ACL : https://<instance-name>.service-now.com/sys_security_acl.do?sys_id=cbfb0ca3931102009c8579b4f47ffbc2 Review the above ACL and its required roles section to see which users are granted access to this page. As per the OOB configuration, this ACL should include "snc_external" and "snc_internal" roles. Revert it to the OOB version to fix the error on the login page.