Error message

Syntax error - http://calendar.yale.edu/feeder/main/eventsFeed.do?f=y&sort=dtstart.utc:asc&fexpr=(((vpath=%22/public/Aliases/Listed%20By/artsWorkshops%22)))%20and%20(entity_type=%22event%22%7Centity_type=%22todo%22)&skinName=list-json&count=3