Image comes out of poor quality

[olkankutlu]

Hi
did you size but did not

“our image is too small. For the layout you have, the image should be at least 280*164px.”

[SatishGandham]

You have to upload bigger images.

[olkankutlu]

I think you don’t know!
Would you look at the 1080x1080 pixel image I added?

[SatishGandham]

Set thumbnail size for desktops to 280*99999 in customiser -> Theme Options -> Latest Posts, HomePage

[olkankutlu]

Thank you

but again there is error.
yoast plugin not working