Hi,
There was an update to the server earlier that caused issues with the branded password pages not working correctly, but that change has been reverted and the pages should now work as before. With regards to the branding page not being easy to find, this is because we deprecated the branding and custom domains features back in 2017 as a move to make Axure Share more secure and HTTPS-only. Users who had content in those tabs could still see them, but otherwise they were removed from accounts.
If you’re still seeing issues with your specific branded password page not working, please send an email over to support@axure.com so that we can assist you one on one. Thanks!