Here's some quotes from the BIG Help Thread that might assist you:
Bad tokens is the servers way to tell you that something went wrong when loading a map/location most of the times. The client failing to communicate with the server, or other way around. If there was some connection problems just during the time you tried to load a new map, this might happen to you. Also maps that has an extreme amount of online users, or more objects and other custom things might take longer to load, and the chance of getting bad tokens might rise. Usually the issue doesn't last for too long and get solved by just trying going through a portal again or loading the character again or just keep reconnecting, for some it's worse than others.
Performance of the computer means a lot if you are going to have a difference between a choppy game, and one that flows like a river. FeralHeart can be very demanding on your computer at times, and not everyone has a NASA computer standing in their closet, this is why the ingame settings are good to have.
Is the game running slow and is hard to play? Try turning down the settings making it less demanding!
Under the video tab you'll find these settings:
Rendering Subsystem:
This decides which kind of rendering that will be used for the game. Try both and see what works best for you.
Video Mode:
Changes the resolution = How many pixels that will be rendered on the screen. The higher the value, the more sharper things will look, but it will also be more demanding for your computer.
Fullscreen:
This one explains itself, it sets the game in full screen or not. If you like to do other things when you play, keep this unchecked. If you want to focus on the game, and the game only, why not use fullscreen?
Anti-Aliasing:
This is used for even out sharp edges on the screen, the higher the value, the smoother everything will look. This setting is very demanding and is not recommended to use for users with slower computers. Keep it on None unless you know it works well.
Water Reflection:
Turns water reflections on and off. Makes the computer work more.
View Distance:
How far you can see the objects in the distance. The game does look nicer with this as high as possible. But if you lower this it will most likely make your game move smoother.