Hi
As you can see on your screenshot:
the 404 error is coming from your
webserver. You have not configured it to use URL rewriting and so you should not enable "Use URL rewriting" in Joomla global configuration.
If you set "Use URL rewriting" to "No", your URLs will have /index.php/ at the start and they should work (not 100% guaranteed, it also depends on how you configured your webserver).
If you set "Use URL rewriting" to "Yes", then you
must configure your webserver to allow URL rewriting. Here is the
Joomla documentation for configuring nginx.
Best regards
Yannick Gaultier
weeblr.com
@weeblr