I am having some of the same issues others have been reporting with the grss upload. I have the correct folder and path chosen but it keeps giving me:

Characters highlighted like this are not currently in your database. If the box next to their name is checked (and "Played by Whom?" drop down has no selection), the character will be created and points credited properly.

When I hit submit raid...brings me back to beginning upload screen. Been working fine for months now up to yesterday and tonight's raids.