My app displays " error 515"

MIT App Inventor Help
1

In my apps, when I use another Screen,display the error 515.
How should I fix it?

BTcontrol.aia (28.9 KB)

2

It is impossible to use BT with multiple screens normally. The BT component does not stay connected when changing screens. After switching to another screen, you must reconnect to the bt device. It's best to use horizontal or vertical arrangements instead of screens, then hide them and show them depending on what you want to display.

3

Thanks, I solved it.