Yup - have a look at the info about rating on the main jam page. You can't give 0 stars (itch's error, not ours!) So use 1-5 stars in the main categories (which apply to all games) and use 1 as 'not applicable' in supplementary categories where they don't apply to the game you're rating.
I have this problem too, the first time it told me to complete the captcha, which I did, and when submitting the second time it told me I have no score for Writing.
Same problem here too. I gave 1-5 stars in every category but when submitting I got message that I didn't rate Writing (although I did rate it). I can save my ratings in any way.
I imagine this is really frustrating for you. But on the bright side, it should be cool to see a lot of votes flooding in at once. I'll do my best to add to that.
In the meantime, can I suggest that everyone keeps their rankings on a spreadsheet or a sheet of paper? This is actually a good idea anyway, because you can ensure that your rankings for each game look fair relative to the other games and you can submit them all in one go. At least that's what I always do.
