If you are using a personalized template set (if you have cloned it for
example) :
Go in admin -> templates. Find the templates set you are using, beside the
name "News" click on the link named "[List (11)]". Find the template called
"news_index.html" then press the link named "[Delete]". In the next screen,
when you see this question "Are you sure that you want to delete this template data?"
validate by pressing "Yes". The previous screen will reappears and you will see
a yellow line, click on the link named "[Generate]"

5) If you are using the default template set. First create some test news then
go on the part of your website where your users can see the news (for example
http://www.example.com/modules/news). If you can see the test news, come back
to the admin part of your site. Go in the news module's preferences and for
the option named "News Display Layout" select "By topic". Come back to the
visible part of your website (http://www.example.com/modules/news).
If you can see your news, ignore the rest of this point, else, if you
can't see the news then, in admin -> templates, beside the default template
set, click on the link named "Clone", give it a name then go in
admin -> preferences, select "General Settings" and in the scrolling list
called "Default template set", select the template you have previously
cloned.