SharPen, try using the message function in the app. It's also possible there are no claim opportunities in your area right now. Job posting on the app can be erratic. Check your reliability score in the profile section. While a single incomplete will affect the score somewhat, it's the overall score that determines your offers.
Lastly, if you can see that you are going to run out of time, there is usually an "extend deadline" button on the job overview. If it's not available, message from the app and select the appropriate job for the subject. Tell them you need an extension. You may or may not get it, but as long as you message they won't ding your reliability score.