We’d love to tell you how to fix the problem, but nobody else seems to be having it.
I suggest that you:
a) Make sure that you uploaded *all* the wordpress files correctly.
b) Clear your browser cache and reload the write pages by hitting CTRL-F5.
c) Turn off whatever ad-blockers, privacy protections, proxy servers, etc that you may have running.
d) Disable your plugins and see if they might be causing the problem.
e) Try other things until you figure out what the actual cause is.
In short, this is not a known problem with WordPress. It’s not something everybody else is experiencing.