If your tunnel doesn't work, please do the following:
check the problematic location configuration in the admin console.
If you have a static IP configuration, take a look at this article and see if everything is correct: link.
If you have a dynamic IP configuration, take a look at this article and see if everything is correct: link.If it still doesn't work, please open a support ticket and provide the following informations: The public IP of the location, the parameters you used to set your tunnel up and your network configuration.