What graphics card are you attempting to play CYPHER with?
Some older and legacy graphics cards don't support texture sizes other than powers of two. You may want to try updating your graphics drivers, but I am afraid there are not currently any known workarounds other than installing a different, more modern, graphics device.
We have been aware of this issue for some time and have been working on a fix so this does not occur in the future.
Thank you for your help and interest in CYPHER!