Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
First, check whether your local WiFi router is On, showing activity and lights.
Second, check whether your Roku shows as connected to the router... if connected by a cable or network cable or Ethernet cable, remove the cable at each end briefly, then plug it back in firmly.
See if that helps.
Let me know what you find out by trying this, please. Thanks.
1. Is the Roku connected to the router with a cable?
2. Or is it a wireless connection?