What would cause a call to 'getHttpProxyInformation' to fail when getWiFiIPAddress() succeeds?

[JesseRMeyer]

I'm in the middle of debugging why my Ionic 3 application is unable to communicate with the internet. I've been able to confirm that my application receives an IP address using this helpful plugin, however, I cannot receive any proxy information of websites, which I think is a clue.

Upon calling getWifiAddress(), I get : WIFI IP: 10.66.61.134, Subnet: 255.255.224.0
However, upon calling getHttpProxyInformation('www.github.com'), I get : Unable to get proxy info: Error while calling ''getHttpProxyInformation' 'protocol = null, host = null

I believe this is unusual and unexpected.

So how can the app both have a valid IP / Sub but not get proxy information regarding a website? The app is connected to a functional network.

Is this a permissions issue? My Config.xml contains the following lines which I believe are relevant:

[JesseRMeyer]

The ADB logs show:

2019-04-12 11:47:54.153 20602-20703/com. W/CordovaPlugin: Attempted to send a second callback for ID: networkinterface515921729
Result was: "Invalid action"
2019-04-12 11:47:54.155 20602-20703/com. W/CordovaPlugin: Attempted to send a second callback for ID: networkinterface515921730
Result was: "Invalid action"