Access Control not allowing typing in fields and not saving when selecting users?

I’m trying to provide SSH access to a user, so I navigated to Virtualmin 4.17.gpl > > Webmin > Servers > SSH Server > Access Control > Only allow users > unable to type in characters > I can select the … button > select user > Save > Apply changes > Access Control > no users saved?

Any suggestions on how to make Virtualmin work to allow SSH access please?

Didn’t work.