'Bluetooth Keeps Stopping'

Neighbours Samsung phone (J3) problem.
Every time it is switched on/logged in ...message in box at bottom of screen (rest of screen greyed out)...Bluetooth keeps stopping...'App Info'...'Close App' are the two options.
When selecting either option it will go to App info...after a few attempts.
Tried 'Force Stop' with no response.
Bluetooth isn't required and just want to disable it.
Any help Please.

PS. I can tap the grey screen and revive it but there is still no change whatever I do.

More...I have cleared the Bluetooth cache and the problem goes away until the phone is started again.