Hi Sandra, Thanks for reaching out. Can you please send a screenshot and send it through direct message by clicking on my profile so we can check this for you. Thanks.
I suspect a client did not want to ask a question but could not figure out how to eliminate the question entirely.
Either that or it is not a serious job posting at all.
Nothing to worry about, really. If you think this is a real job posting, you can apply and simply say something generic in the blank question area, such as: "I look forward to discussing the project with you."