[SOLVED]Canvas problem

Hi, ive got problem with Canvas GUI. I dont know why but since ive imported one asset to project my canvas is really "cracked" For example as you can see on image the inputs and the blue border. its image but its "cutted" i dont know why.. on some resolution its good but on some not.. before it was good and after this importing the package its bad

Package installed: Unity Samples: UI

Thanks for reply