Toast Tables will not allow guest to add themselves?

[TBIAP]

First time going on a wait with Toast Tables and guest can not add themselves from the link.  I think I have everything set up properly, but is there something simple that I may be missing?  Like a toggle, or some type of small setting.  Toast support if offline:/

[rcmck]

There is a toggle, but also further down there is one to allow joining when there is no wait as well.