You've reached your streaming limit!
I only have one stream going on a computer. All of the other TVs are off and were shut down correctly. None of the TVs will play - they all get the above message with error code 30001-018. This just started today. Two days ago, I upgraded the firmware on my ASUS router. That fixed a problem I was having on one of my devices. All of the other units were working just fine until today. I am running an RCA Roku TV and have three Roku Ultra's on the other TVs.