quality of media library

A week ago I was facing a problem in the photo library, which is that the uploaded images appear in the form of grey squares. I tried to solve the problem in many ways but nothing worked.
and now suddenly when I upload a photo it appears but with a weaker quality than before.

this is the the library

https://drive.google.com/file/d/1QpzdMRWoUg4VRoAqr7e6vNtRzWD-TajF/view?usp=sharing

this is the original photo

https://drive.google.com/file/d/1HV9bInogF1F-arFMxUEBWPJEuXki0Onq/view?usp=sharing

this is the quality when i upload the photo

https://drive.google.com/file/d/1Hm7LnjAng2X5XhYqFDCcNDXRA0BIBBx8/view?usp=sharing

The page I need help with: [log in to see the link]