[Galaxy-ng] Issue in installing / downloading collections using Galaxy UI

Hello,
I have freshly installed Galaxy NG 4.9.2 and I am having issues in downloading collections.

When clicking on download Tarball, It redirects me to a pulp page.

/etc/pulp/settings.py contains the following:

CONTENT_ORIGIN='https://<server_url>:443'
ANSIBLE_API_HOSTNAME='https://<server_url>:443'
ANSIBLE_CONTENT_HOSTNAME='https://<server_url>:443/pulp/content'

CACHE_ENABLED=True
SECRET_KEY='secret'
REDIS_HOST='localhost'
REDIS_PORT=6379

Can someone help in debugging this?

Some additional context, it works when downloading collections using CLI