I got a beta key yesterday from ten ton hammer, created a gPotato account and successfully redeemed the key with it on this website.
I then installed and patched the game without trouble; but when I want to log in, it goes through the whole process of connecting and gives me the error mentioned in the title.
I'm absolutely positive I'm using the right password and ID...
Also, no servers show up when I click on the server list.
There appear to be more people having the same error, but I've seen no real solutions.
Now, I've had this same problem once before in the Fallen Earth closed beta, and what happened there, was that the launcher was set to the EU version (I'm in the EU), while the beta key and patches were the US version (witch is also the case here I think).
I solved it there by putting the launcher to the correct region.
But there doesn't appear to be such an option here, and I'm not sure if there even are different versions of the game / launcher...
Any of you have a clue on what to do?