StorageGRID SG6000 Installation failing due to unresponsive web GUI

Applies to

• NetApp StorageGRID 11.4
• NetApp StorageGRID Appliance SG6000

Issue

• Installation of a new SG6000 appliance is failing due to unresponsive Appliance Installer Page.
• Lumberjack cmd.log shows connection errors:

ERROR -- Connection error while creating SYMbol connection
  ERROR -- Connection to agent failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/SYMbol/parser.py", line 1889, in __init__
    self._connect()
  File "/usr/lib/python2.7/dist-packages/SYMbol/parser.py", line 1898, in _connect
    self._socket.connect((self._ip, 2463))
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
error: [Errno 111] Connection refused
   INFO -- Calling discoverControllers with None and <<class 'SYMbol.parser.DiscoveryResponse'>> at 0x7fad87781290>
WARNING -- Union <<class 'SYMbol.parser.RpcAcceptedReplyBody'>> at 0x7fad8778e2d0> discriminator value SYSTEM_ERR does not have a corresponding qualifier
   INFO -- Calling discoverControllers with None and <<class 'SYMbol.parser.DiscoveryResponse'>> at 0x7fad87744d50>
WARNING -- Union <<class 'SYMbol.parser.RpcAcceptedReplyBody'>> at 0x7fad8774be50> discriminator value SYSTEM_ERR does not have a corresponding qualifier
   INFO -- Calling discoverControllers with None and <<class 'SYMbol.parser.DiscoveryResponse'>> at 0x7fad877058d0>
WARNING -- Union <<class 'SYMbol.parser.RpcAcceptedReplyBody'>> at 0x7fad8770a9d0> discriminator value SYSTEM_ERR does not have a corresponding qualifier
WARNING -- Failed to get currently selected qualifier name for union. Assuming none.