I don't know what the problem is. Although the image is uploaded, the names are correct, and the properties are as well, when I run the application, the screen is white and no images appear. Please help
It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select "Download Blocks as Image". You might want to use an image editor to crop etc. if required. Then post it here in the community.