Images not displaying in Github Pages?

As @dnivog mentioned, GitHub's servers take a little time to update files.

If nothing of the above addresses your situation, just check back in a little while. ⏳

Nevermind, I solved it.

If anyone has the same problem.

GitHub Pages are case sensitive. Not only for folders, but also for image names.

Write what you see.

It is Screenshot2.png. With a lower-case png and a capital S at the start.