octoprint Can't Connect to UI Loading Failed -- Socket connection failed

octoprint.log

 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
 octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:10.0.0.28
 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:10.0.0.28
- octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:10.0.0.28

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