Template not getting called

Good Morning. I started this in a different area but is really a template issue I’m not understanding. I’ve read a few time the template hierarchy how-to. I am using code Blue theme and has 2 side bars. I need a page without so made a template using page.php and inserted:
<?php
/*
Template Name: NoSidebars
*/
?>

and then removed the lines that call the sidebar files. I uploaded and put in my Code Blue theme folder. My page does use this them in its edit page and if I go to the themes section in admin the NoSidebars.php shows as a file I can edit so it’s definitely there.

Why doesn’t this file get called by my page?

Thanks for any help.