Print fails on one side

[Naturyev 0]

Many of my Prints look like that. Does anyone have any idea how to fix that?
My printer is the Cr-10s. I am using cursa version 4.8. 
I get the same results with version 5.

[Framar 38]

Can be multiple issues. Start with the calibration of the first layer; if your bed is warped maybe the material is not squished enought against the printing surface causing poor adhesion. Make sure your print surface is clean and/or add gluestick/ 3Dlac/Magigoo.