The Solution

After notfying the Fluent Forms Team they realeased a hotfix withing 24hrs, which I greatly appreciate. Now the service is replaced with Google's API. You can obtain you API key at https://cloud.google.com/.

The Issue

If your form presents an error such as "Sorry! Please provide valid token for ipinfo.io in global settings" or "There is an error occurred in getting Country using geoplugin.net"

You need to go to your form's settings and disable the country based restriction. There is a possible conflict with your plugin.

I have experienced this issue with 2 websites on different hosting environments.