I'm observing two issues when trying to add a new adapter:

• Start server in domain mode, go to console
• Configuration -> Profiles -> default -> Resource Adapters

1. Add new adapter but fill only Name (that's the only one required)
   • Successfully added [ ("profile" => "default"), ("subsystem" …
   • (is the JSON necessary?)
2. Try to remove the new adapter
   • Unknown error (WFLYJCA0077: At least one of ARCHIVE or MODULE is required)

The wizard shouldn't add it if it's missing required items; furthermore if you shut down the server you can't start it again (unless you manually fix domain.xml)

1. Try to add new adapter with the same name
   • Unknown error (WFLYCTL0212: Duplicate resource)

This should at least say something else than "uknown error".