[Bug]: .today domains not supported

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Unable to use .today domains in iOS app

Steps to reproduce

1.login to using iOS app with .today domail
2.
3.

Expected behavior

Should. Login

giving 503 error

Installation method

No response

Operating system

Debian/Ubuntu

PHP engine version

PHP 7.3

Web server

Nginx

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

N/a

List of activated Apps

N/a

Nextcloud Signing status

N/a

Nextcloud Logs

N/a

Additional info

N/a

Start by reproducing the iOS login against a .today domain and investigate the reported 503 response. The issue names no source file or test and provides no logs, so confirm the failure details before identifying the affected login path; done means a .today domain can log in without the 503.