"Add" Button Missing from Navigation Settings
I am trying to limit permissions on the "My Work" page to specific AD groups. I know I have done this before, as I restricted it to the Analysts group already when I installed it about a year ago. Today I went to add another group, and the group shows up when I search in the box, there is no "Add" button next to it as I would expect. This is preventing me from being able to add a group to filter the view by. Based on another thread I was reading, I removed our custom.css and custom.js files, restarted the cache builder service, and did an iisreset, but the issue persisted.
The results are the same whether I use Chrome or Edge, and it does seem to affect all nodes (knowledge, etc). It is also not specific to the group I am trying to add.
One final detail to note is that the box where you enter the group name has a thin black border around every side except for the right side where the "add" button would be.
Any ideas what is going on here? Thanks!