We've tested TERA yesterday and we found out that some countries are blocked.
Anthony lent me his login details to run some few tests. And since I live in a different country, I was not able to login.
You will still be able to download the client without logging in by using the link below:http://download.enmasse.com/TERA-Setup.exe
Once the client is installed, you will then be asked to enter your login details. Again, the "User Authentication Failed" error will appear.
Patching will "NOT" continue unless your login details are accepted.
We do have a solution for this and that is the Smoothping VPN which will be available to the public soon.
Using the VPN, I relaunched TERA and entered my login details. Viola! Patching is now in progress as you can see in the screenshot below.
We can help you download and patch the client if you are experiencing the same problem so feel free to contact us.
Ping lowering will come later after we are done with the testing.