How did you install - rebranding from L09/L19, returning from Open Kirin, upgrading from b528?
If you properly followed OP instructuns you will have system apps, definitely stock camera.
Might be that you didn't properly rename a ZIP file or tha...
You didn't write most important thing, what is exactly your model, cust and build number (precise full build name from Settings/About, like EVA-L09c900b182 or so), but read this about rebranding and updating from Marshmallow:
This is my antutu score before and after i installed LKT. This is the first time that i reach 152k antutu score. I'm using turbo mode. Thank you!