Camera is used by another application

Hey! So I don't know why it does this but when I open an app (Kik to be more precise) and wanna use the Camera it says Another Application is using it , How may I fix it?

Here is what I tried:

Clear Data and Cache of Camera

Removing Apps Permission to have the Camera except Camera and Kik

Remove all Recent Tabd

Phone is Not Rooted. Asus Max (X008DC)