Can't customize login page

Running 11.11.3-ee

When we setup GitLab a few years ago, I added a logo and linked to some documentation on the login page. The logo was added by specifying a URL, which doesn’t appear to be possible anymore.

At one of our upgrades, possibly when we moved from the community --> enterprise edition, the logo link broke.

Now looking at Admin->Appearance, I no longer see a place to put in a logo URL, and I don’t see the box where I put in the documentation link.

I DO see a new place to upload a logo, and a place to put in a description for the sign-in page, but I DON’T see any way of removing the broken stuff that’s currently there.

Does this ring a bell with anyone? Any ideas?