Below is the HUB Debug log for your reference.
5/3/2017 3:03:31 PM Error in load event in Plugin for Guest Access - Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
5/3/2017 3:03:31 PM Error loading plugin Guest Access Plugin. It will not be loaded - Object reference not set to an instance of an object.
5/3/2017 3:32:36 PM Loaded Plugin: Guest Access Plugin -
5/3/2017 3:32:51 PM Plugin Manager - Loading assembly ... C:\Program Files (x86)\Intel\Intel Unite\Hub\Plugins\MetricsPlugin.dll -
After off the [Verify Plugin Certificate Hash] in admin portal.
HUB DEBUG Log :
5/4/2017 11:04:05 AM Error in load event in Plugin for Guest Access - No connection could be made because the target machine actively refused it 127.0.0.1:1234
5/4/2017 11:04:05 AM Error loading plugin Guest Access Plugin. It will not be loaded - Object reference not set to an instance of an object.
I have resolved this issue.
cause of the intel guess access default setting is Automatic(Delayed Start). It was been resolved after I change the setting from Automatic(Delayed Start) to Automatic.