flexget error

root@Router:/opt/local/bin# nice -n 19 /opt/local/bin/flexget -c /opt/local/bin/fgconfig.yml execute
2015-09-07 00:05 VERBOSE  task_queue                    There are 1 tasks to execute. Shutdown will commence when they have completed.
2015-09-07 00:05 CRITICAL plugin        showrss         'ascii' codec can't decode byte 0xe2 in position 1710: ordinal not in range(128)
2015-09-07 00:05 WARNING  task          showrss         Aborting task (plugin: rss)