Been having slow down, now nothing. 9/13/2018 8:30pm central USA. Using iPad, iPhone and current SmartThings Classic app, turning Things on or off results in Turning On or Turning Off for long periods of time and then no effect to Things. This includes real and virtual Things. Routines run, but no effect. Amazon Alexa devices respond acknowledge successful operation of Things, but no effect.
Hub is up and online. IDE indicates Things online.
What should I check?