Remove ‘Invitation Code’ fields from Login and Registration Page

I am using Ultimate Member for the first time and I’m trying to work out how to remove the ‘Invitation Code’ fields from the Registration and Log In pages. I’ve searched through every option in Ultimate Member and cannot see where this can be disabled. I do not need this on my site so would like to remove it. I’ve searched online but can’t seem to find any guides or information. Does anyone have any pointers please?

The page I need help with: [log in to see the link]