Did you just get the Roku 9.4 update? Check via Settings > System > System update. If so, while you're there, click Check now and make sure all your channel apps update to their latest 9.4 compatible versions.
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T