ummmmm can you be more specific? what happens? error message? your phone freezes? nothing? what phone do you have?

just remember the more details you give us, the better we can help.

 

I turn my flashlight on and off with Harry Potter spells lol.

Lumos Maxima to turn it on.

Nox to turn it off.

I know it doesn't help but....

 

what phone do you have?

 

I'm only a muggle, so I can't do that.

 

I use Icon Torch. Hasn't failed me yet.

 

It sounds like you have installed an app that affects the camera.

The flashlight is part of the camera system.

Check your device administers.

Settings
Security
Device administers

Also, it's possible that if you are using a different camera app than stock, you are getting interference.

Check your quick settings tiles, and go to the editing section.
Look for more than one flashlight icon.

If there is another one, switch it out for the one you have.
This would occur if you are using a camera app of your own, rather than the stock one.

After you make any changes, and turn off any apps that control the camera (or restrict control of it), restart the device and then try the flashlight again.

 

Okay. Makes sense .

I tried a mostly white screen but it didn't work to well as a flashlight.