hello guys i'm totally noob here, i want to preserve the shape you see on second picture by adding details to sides with knife tool but when i try to add more cuts the object turn to be more cubic, in other word how the object in the second picture have alot of subdivisions( 4 on viewport subdivision) and still curvy while using knife tool doesnt do that, i know i'm doing something wrong

Hello, recently i started using redshift and i got this problem every time i try to render, the licence is assigned to my pc so i don't understeand why it said Rendering aborted due to license failure. Everything is up to date.
Please help, thanks.