If you are able to access Apex Fusion, but find that you can't control anything, update your outlets/configuration, or are receiving a "Send Failed" or 502 or 504 error, then you most likely need to enable Fusion Control:
Via the Apex Classic Dashboard, go to configuration> Network Configuration> Apex Fusion Control Enabled> restart your controller
- OR -
Via your display screen: System> Net setup> Apex Fusion Setup> Server: ON > Control: ON> restart your controller
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