Can't edit permalinks or add links using wysiwyg editor

When editing a page, there is a place directly under the “Title” that you can click the “edit” button and edit the permalink. When I hit edit, it’s not allowing me to edit the permalink. It does nothing. (I’ve done this on other WP sites so I know what it’s supposed to do.)

Also, I noticed (not sure if they’re related) that when I try to use the wysiwyg editor to add a hyperlink, it also doesn’t work. (Again, other WP sites have worked for me so I know what it should do.) It’s not showing me the list of all my pages that I could choose to link to – and if I manually enter the URL and hit “Add Link” – it leaves the page without saving it and for some reason takes me to the “Posts” section of WP. Weird, I know.

Any idea what’s up? Other parts of the wysiwyg editor (like bolding/italicizing, etc.) seem to work, for whatever that’s worth.