Edit: Got the error again. Either WTM has problems or AW doesn't handle the error/redirect.
Could you please try again? The problem was that http got redirected to https and json consumers not always handle that.
Good idea to also switch to https if possible

@patrike please force all communications to wtm to use https.
Thanks - I will adjust Awesome Miner to force HTTPS for WhatToMine in the next update.