Problem with Auto-Rotate option on Android phone: Vivo Y51L

[AC Question]

The auto-rotate option on my Android phone, Vivo Y51L wouldn't work... my not even able to find the settings for the auto-rotate option on the Settings Menu.
It was working fine until yesterday and suddenly the auto-rotate would stop...
Let me know if you have any solution...

Thanks,
Victor Carmen

 

[belodion]

Have you tried the simplest attempted fix, a Power Off and Restart?