So this of course like always when Tera Online decides to do something they never do it right and if you've had the problem before you'll find out that redownloading the whole game to fix this bug isn't working and its failing to download patches as well cause you know how Tera is. After running though everything that was in all of the online posts and realizing nothing worked one of my guild members sent me a fix for this problem. This might not fix future problems when they go and make new updates but it will get you playing right now if you can't play cause of this error.
To make it really simple I made a quick little installer to add the files so if you aren't a computer pro all you need to do is double click and install.
32bit Manifest Launcher fix
64bit Manifest Launcher fix
If this helps you feel free to share it and give me some google+ love <3