Cameras not streaming?

Hi, I have a technical issue. I am in the UK, all 5 of my devices are showing they are connected to my router with good signal strength, on the dash board I can see an image from the 4 cameras from 4s ago, so I know they are working, but I cannot stream the video from any of them. I noticed the issue because my door bell did not ring the chime. Is there a problem with the ring systems or has there been a change on the app? I have had no changes with my internet or router and I have rebooted my router? Sorry if this isn’t the correct place for this kind of post. Thanks in advance.