security policy ?

[samy2022]

Today, I used the camera a lot, it worked great but sometimes when i unlocked my phone and the camera opened, I sometimes received a message saying "the security policy prevents the use of the camera", and I was ejected from the camera.

what's this security policy?

[Tallman · Accepted solution]

Does reboot your phone able to fix the problem?

[samy2022]

it seems to work for now

[RedDogRabbit · Accepted solution]

The inability to use the Camera due to "security policy", could just be a "glitch" and restarting the phone device could resolve the issue.

It's also possible that a 3rd party app may cause the problem. In this instance, Booting into Safe Mode, may confirm this to be the case.

If the device's sensor settings have been changed, they may also cause the error. 

Check that the sensors used by the camera are enabled. This is normally an issue if changes have been made in Developer Options, so check there. 

The most likely cause would be something corrupted in the Camera app's Cache and or Data. Clearing Cache & Data for the Camera *SHOULD* correct the problem. 

[samy2022]

It seems to work for now.
It may be caused by a third party app, I installed a few of them to decorate my home screen, I will uninstall them as soon as possible

[RedDogRabbit]

As strange as it may seem, I know that there's even a couple of Gallery apps, that while they don't prevent you from using the camera itself, they will prevent you from taking screen shots.. which is kinda weird. 

[NoCam]

I am having the same problem, exact same message when I attempt to use my camera
I have gone through clearing the cache and data, reboot to no resolve
This is extremely frustrating

[samy2022]

I suggest you to try @RedDogRabbit suggestions that you haven't tried yet, and to do a wipe cache partition (just in case)