Legal Case Management - Editing after Publishing / Domain / Use without Domain

Good day,

Hope you’re doing well.

I need assistance.

I published the Legal Case Management application. I want to:-

  1. Continue editing the app as I published without full knowledge, however, it does not “allow” me to. If I say “add block” nothing happens and the side bar does not appear as it previously did.
  2. This is for internal use only - do I need a domain?
  3. Can I utilize the app without a domain?

Thanking you in advance for your assistance.
Kind regards,