I just went through and build a set of lineups in the optimizer. I then proceeded to "Download All" and Import said CSV file into the DraftKings Lineup creator.
I am getting this error " Incorrect player position header for sport."
After researching come to find out the Player ID's used on DFC are incorrect, if i download the sample file from DK all of the player ids are off which is causing this error. This ideally should be fixed immediately.