What should I do if I’m seeing an error “Device is busy” on littlelf smart/Owltron App?

What should I do if I’m seeing an error “Device is busy” on littlelf smart/Owltron App?

1. Please restart your phone(Usually it fixes the problem);
2. Clear the App cache to try.
How to clear the App cache: Open the Littlelf smart/Owltron App>Tap "Me" in the bottom right corner>Tap the "Hexagon icon">Tap “Clear Cache”>Cache cleared successfully.