How to disable IPV6
Because of network limitations, if you use the LagoFast application with 'Unable to connect to the Internet' 、 'impossible de se connecter à internet', please try to disable IPV6 to solve this problem!
Step 1:
Find and open the network settings in the bottom right corner of your PC

Step 2:
Go to the Network and Settings Center

Step 3:
Select the network currently being used by the device

Step 4:
Select Properties

Step 5:
Find the IPV6 protocol and cancel it

Step 6:
Select OK

After completing this step you will be able to reconnect Console to the network and successfully boost the game using LagoFast!