Why is the site displayed incorrectly after uploading to the server?

Question

Web development

Designed the site, made adaptation.
Locally, the site was well displayed, but when uploaded to the server, many elements, especially in mobile adaptation, moved chaotically (images over text and the like).
When you open the site, on the main page in the first block on the right there should be text and a button, they generally disappeared somewhere.

What went wrong?

Answer 1

F12 -> Console
There you have all the errors. fix them

Answer 2

This is usually due to the fact that some paths to elements are written as "C:\users\user\My_Documents\this_site\element".