I forgot to update this thread.Captcha is working again. Or at least it did this morning when I tried to take IRB. I DQed on every survey available to me so I am not sure if it is actually crediting but it probably is.
Haha nikkums, I got excited as well when I saw DS 8 was working again... only to find out that it actually is not working. I am seeing the same error as you as of 8:45 PM EST. I will try again tomorrow.
I actually opened a support ticket for this one since I thought maybe it was really just my account. I took Samplicio under Cash Offer but I got an error at the end of the survey instead of the Samplicio congrats screen. I hit DONE anyway, hoping it would credit. When it became obvious that it wouldn't, I went back into pending to try and take it again. That is when I saw the error that zerozed0 saw. Not the biggest deal in the world if this is the way it works now, but you do have to be sure that when you hit the DONE button, that you really are done.