error opening gui

[eric at aisling-technologies.com]

Today I am suddenly receiving the following error when I attempt to open the
genieacs gui.  Any help would be greatly appreciated.

Failed to open TCP connection to localhost:7557 (Connection refused -
connect(2) for "localhost" port 7557)
Extracted source (around line #17):
              
15              threads << Thread.new(slice) do |slice|
16                http = create_api_conn()
17                res = http.head("/devices/?query=#{CGI::escape
ActiveSupport::JSON.encode(slice['query'])}")
18                slice['data'] = res['Total'].to_i
19                slice['href'] = url_for(controller: 'devices', action:
'index', params: {query: ActiveSupport::JSON.encode(slice['query'])},
only_path: true)
20                slice.delete('query')


Rails.root: /opt/genieacs-gui