Camera [Q] ''Cant connect to camera''

Hii..i have and android education tablet which i have got from my collage.Its company name is ''peach''...currently running on andoid 4.2.2.My problem is i am not able to use its camera ,it has two cameras.There is no camera application shown in menu and when i try to open camera using 3rd party apps like camera 360,picsart..etc it is showing ''Cant connect to camera''....all my friends are facing the same problem....HOW CAN I FIX THIS PROBLEM ??...Some one please help me ...!!..
Thank you