If it is anything like most other scanners, they rely on people in each area to stream the scanners. The person that streams the county you want to listen to may have had internet issues, computer issues, scanner issues or just decided not to feed anymore. You can go to radioreference.com and see what is online, m.radioreference.com on your phone and browse their online feeds, which will tell you the last time that they heard anything from the feed you are looking for.