I had the same issue when I tried posting a poll with options as "Yes" and "No". What I found out is that, if I have the options as "Y" and "N", the "Ask" button will be back to normal. So what I did was, change the options to "Y" and "N", then change back to "Yes" and "No", and I can poll as desired with no problem. Your option test might be different, but maybe try this out, hope this helps.
Make sure that you have the information on questions as 'Ask' button will be enabled after entering the information in the questions.
Please mark it as solved if my reply was helpful. It will make it available for other as the proper solution.
Best Regards
Sandhya