21: 49: 10: WARNING: WU00: FS00: Failed to get assignment from '18 .218.241.186: 80 ': No WUs available for this configuration 21: 49: 10: ERROR: WU00: FS00: Exception: Could not get an assignment
This means that it cannot find an available work unit to download.
This is a problem on their end, not a problem with your configuration. Too many people trying to fold all at once their servers can't keep up with the demand.
If you let it run it will download a work unit when its available and automatically start working it. If you still can't find a work unit after an hour or so try hitting the Pause button, wait a few seconds and then resume by hitting the Fold button. This will force it to recheck for any available work units.