Images Gallery

Hi, I have a problem with my images gallery. It visualized with bad resolution and distorted on the home page from a few days ago. I don't understand why. Can you help me please ? You can see it here http://www.minormoves.net/ and here you have a screenshot https://drive.google.com/file/d/1O3gNYZlTZ_Z6XVP0SmpWJjb5Wyg13wrt/view?usp=sharing Thnak you