This is your problem: choices => [ 'Exit', 'Add Server', @{$$menu_array[0]} ]

What $menu_array looks like is something like this:

[
  [ "server_name_1" ],
  [ "server_name_2" ],
]
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The statement @{$$menu_array[0]} grabs the first element of the array ref, which happens to also be an array ref ([ "server_name_1" ]), uses it as a list, which ends up simply being ( "server_name_1" ). I'm not familiar with the various Term modules, but I assuming that get_reply is expecting a list of answers. Something like this would probably work:

$answer = $term->get_reply(
                    prompt  => 'Select Server: ',
                    choices => [ 'Exit', 'Add Server', map { $_->[0] }
+ @$menu_array ]);
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