Trouble creating Spun child theme

Hello kind people, I’m hoping you can help me. I love the Spun theme (Thank you Caroline!) and have so far managed to get somewhere (ish) with the whole wedsite thing, which is all new to me. landlayers.co.uk is what I’m up to.

Having gone a little way down the line with adapting the stlye sheet CSS, I have read here that what I should have done first is creat a child theme and adapt that. This seems sensible, so I’ve followed the instructions at support>publications>child themes. I.e. I use FTP (filezilla in my case) to add a new directory, in wp-content>themes, called spun_child, and in there I create a file called style.css which I edit with notepad and insert the following:
/*
Theme Name: Spun Child
Theme URI: https://example.com/
Description: Child theme for the Spun theme
Author: my name here
Author URI: https://example.com/about/
Template: Spun
Version: 0.1.07
*/
@import url(“../spun/style.css”);
I then went to my WP dashboard and followed Appearances>themes>install theme, I searched for “spun_child” but nothing comes up. So I go to upload (still am in Appearances>themes>install theme), and I browse to find the zipped folder I have sent the new directory (containing only the style.css file as described above. I hit “install now” and the message I get back is
“Unpacking the package…
Installing the theme…
Destination folder already exists. /homepages/16/d432500737/htdocs/app432500752/wp-content/themes/spun_child/
Theme install failed.”
I get the same message when I try and upload the spun theme. But, when I look on Appearance>themes, at the bottom of the page it says:
Broken Themes
The following themes are installed but incomplete. Themes must have a stylesheet and a template.
Name Description
Spun Child The parent theme is missing. Please install the “Spun” parent theme.

Isn’t this a frustrating contradiction?…”already exists” on the one hand and “the parent theme is missing” on the other.

Why is this? Please, can anyone help? I’m sure it is something simple or obvious that I am just missing, but I don’t know what else to try.