Twenty Eleven Customisation Login Time Out Issue

Have you customized Twenty Eleven theme or created a Child Theme?

I havent created a child theme but have started adding various plugins to the Twenty Eleven theme and load a background image. Could this be the problem?

Could be. It seems you might not have updated the theme also for quite some time.

Can you revert to Twenty Twelve theme or just update Twenty Eleven theme?

Note: you will lose all customizations if you update. Save a copy of the theme, and also backup your site so that you can restore if anything goes wrong.

Ive just activated the Twenty Twelve theme and tried logging in to customise but its still doing the same thing and auto logging me out.
I had transferred from wordpress.com 2 days ago through a 1click transfer with Bluehost so I haven’t downloaded the wordpress software to enable a child site to be built and don’t know if I can generate a child site through them without the software? could the problem be something else because its not removed when changing themes?

What’s your site URL?

You can review this link for creating child themes.
https://codex.www.ads-software.com/Child_Themes

https://www.customisedconsulting.com

Ive downloaded the software, created a copy of the Twenty Eleven theme and see there is an exiting style/css file loaded. Do I just replace:

/*
Theme Name: Twenty Eleven
Theme URI: https://www.ads-software.com/extend/themes/twentyeleven
Author: the WordPress team
Author URI: https://www.ads-software.com/
Description: The 2011 theme for WordPress is sophisticated, lightweight, and adaptable. Make it yours with a custom menu, header image, and background — then go further with available theme options for light or dark color scheme, custom link colors, and three layout choices. Twenty Eleven comes equipped with a Showcase page template that transforms your front page into a showcase to show off your best content, widget support galore (sidebar, three footer areas, and a Showcase page widget area), and a custom “Ephemera” widget to display your Aside, Link, Quote, or Status posts. Included are styles for print and for the admin editor, support for featured images (as custom header images on posts and pages and as large images on featured “sticky” posts), and special styles for six different post formats.
Version: 1.5
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Tags: dark, light, white, black, gray, one-column, two-columns, left-sidebar, right-sidebar, fixed-width, flexible-width, custom-background, custom-colors, custom-header, custom-menu, editor-style, featured-image-header, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready
Text Domain: twentyeleven
*/

With:

/*
Theme Name: Twenty Twelve Child
Theme URI: https://example.com/
Description: Child theme for the Twenty Twelve theme
Author: Your name here
Author URI: https://example.com/about/
Template: twentytwelve
Version: 0.1.0
*/

No, the new child theme style.css file should ONLY contain this:

*
Theme Name: Twenty Eleven Child
Theme URI: https://example.com/
Description: Child theme for the Twenty Eleven theme
Author: Your name here
Author URI: https://example.com/about/
Template: twentyeleven
Version: 0.1.0
*/ 

@import url('../twentyeleven/style.css');

Then after that will be any changes you make – but not a copy of the entire parent theme file.

Also, the child theme will only contain that one style.css file to begin with – then you can add only the .php files you want to modify – EXCEPT for the functions.php file – that’s handled differently.

ok Ive updated the ccs file. Do I just go to tools-import and upload the ccs file?

No, you need to upload it using FTP or another file manager your host uses.

Ive not done that before… do I just call Bluehost ans ask them how to do it?

This should be helpful:
https://my.bluehost.com/cgi/help/ftpaccounts

You’ll need an FTP program on your local computer – FileZilla is a popular free option.

ok Ive got the file in Filezilla and configured the FTP. Do I just drag and drop the complete Twenty Twelve Child folder from my computer (left side of the screen in Filezilla) to the right side in wp-content?

Yes, though the child theme folder needs to go in the themes folder:

wordpress
   wp-content
      themes
         twentyeleven
         twentyelevenchild

Ive done that, activated it and now the whole thing wont work, including my site