Why am I no longer able to ask a question?

There are two possible reasons for this: 

1. When you’ve asked all your questions in your billing cycle, the button will be grayed out until your cycle renews. If you have any questions regarding Q&A, please contact customer care at customercare@bartleby.com. 
2. When your account billing cycle has ended and you are no longer subscribed, the button will also be grayed out as you will no longer have access to Q&A. However, you can resubscribe at any time from the My Plan settings!