21.04: Use Active Directory option grayed out

I am trying to set up Ubuntu 21.04 to use Active Directory.

I have the VM installed on a ESXi host connected to AD.

When I get to the point in the install where it asks for username, password, etc., there is an option at the bottom that says “Use Active Directory”. Everything I have read says to click that checkbox, but I cannot as it is grayed out.

Relevant Install Screen

I have tried this with an an AD object already created, non existent, everything. I’ve downloaded the ISO and tried a few times now. Is there something that I am missing? I’ve searched around but it appears this is too new and not a lot of people have tried to mess with it yet.