still cant see child theme

Hi

I have installed a child directory exactly as per instructions on https://codex.www.ads-software.com/Child_Themes

and it still isn’t showing up under dashboard>appearance>themes

To recap on my steps:
I used FTP and found wp-admin>themes>customizr>

created a new dir called customizr-child

created a file called style.css and then input

[ Moderator note: please wrap code in backticks or use the code button. ]

/*
 Theme Name:     Customizr child
 Theme URI:      https://cara-lea-dance.co.uk/Customizr-child/
 Description:    Customizr Child Theme
 Author:         Simon Trainer
 Author URI:     https://www.businessmapper.co.uk
 Template:       Customizr
 Version:        1.0.0
*/

@import url("../Customizr/style.css");

/* =Theme customization starts here
-------------------------------------------------------------- */

went back to dashboard>appearance>themes but no child theme!!!

Any ideas why its not showing

Many many thanks
S