"Oops" Submission error

Hi, my submission timestamped Aug. 28, 2017, 9:43 p.m. has the following error:

Oops! Looks like something went wrong with your submission. If you have checked the submission requirements and are still not sure what happened, please contact us.

I’m definitely not sure what happened, could you please give a more detailed error message? Thanks.
I tried submitting the same file again at Aug. 28, 2017, 10:13 p.m. and got the same message after 10 minutes.

First two lines of the file look like this:

row_id,frame,video_id,fish_number,length,species_fourspot,species_grey sole,species_other,species_plaice,species_summer,species_windowpane,species_winter

@lopuhin In general for support you should email info@drivendata.org. For now, you can just send a link to this post to that address and we’ll investigate the issue and reply to you directly.