Problems with Find Missing Files

I followed the video of the instructor and ran Find Missing Files. Blender found Missing File.

However, as shown in the attached screenshot, my image is broken.

First, Blur was applied when the original texture paint, and the colors' border lines were smooth. However, the border lines changed sharply.

Second, the image has been rotated 90 degrees counterclockwise.

 Why did this happen? Please answer.