Problem with uploading a site from localhost to server

Hi,

I uploaded my site from a localhost version to an online server, following this guide: https://www.webdesignerwall.com/tutorials/exporting-and-importing-wordpress/

The main page is working (not entirely, but that’s a second priority) but I can’t access the rest of the pages, even when trying to preview a page from within wp-admin.

What could be the problem?