Got it done, thanks.

For anyone who might have the same issue going forward:-

The slider revolution plugin was in the theme download, don’t search the plugin store.

Once you’ve installed the plugin, import (option within the slider revolution page called ‘manual import’) the slides folders from the theme download. If successful, you will see the sliders within this page.

Final step, go to Appearance -> Custom and change the Home Page Settings to ‘Home Page 4’, Publish and you’re done.

Hii!

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with your theme, Livecast.

First, visit your website (https://critic.uk/) and check for any visible issues. Next, visit the page where the error was caught (https://critic.uk/wp-admin/post.php?post=3369&action=edit) and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further.

https://critic.uk/wp-login.php?action=enter_recovery_mode&rm_token=Aakj3f88uLXy3IyGVl4K11&rm_key=SSSPCwPm7kKreEAs4yCdGM

To keep your site safe, this link will expire in 1 day. Don’t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.2.2
Active theme: Livecast (version 1.0.7)
Current plugin: (version )
PHP version 8.0.29

Error Details
=============
An error of type E_ERROR was caused in line 66 of the file /var/www/vhosts/critic.uk/httpdocs/wp-content/themes/livecast/includes/codeless_shortcodes.php. Error message: Uncaught TypeError: gmdate(): Argument #2 ($timestamp) must be of type ?int, string given in /var/www/vhosts/critic.uk/httpdocs/wp-content/themes/livecast/includes/codeless_shortcodes.php:66
Stack trace:
#0 /var/www/vhosts/critic.uk/httpdocs/wp-content/themes/livecast/includes/codeless_shortcodes.php(66): gmdate()
#1 /var/www/vhosts/critic.uk/httpdocs/wp-content/themes/livecast/includes/codeless_shortcodes.php(13): codeless_print_timeline_shortcode()
#2 /var/www/vhosts/critic.uk/httpdocs/wp-includes/shortcodes.php(355): codeless_timeline_shortcode()
#3 [internal function]: do_shortcode_tag()
#4 /var/www/vhosts/critic.uk/httpdocs/wp-includes/shortcodes.php(227): preg_replace_callback()
#5 /var/www/vhosts/critic.uk/httpdocs/wp-includes/class-wp-hook.php(308): do_shortcode()
#6 /var/www/vhosts/critic.uk/httpdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters()
#7 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php(1860): apply_filters()
#8 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php(569): WP_REST_Posts_Controller->prepare_item_for_response()
#9 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api/class-wp-rest-server.php(1181): WP_REST_Posts_Controller->get_item()
#10 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api/class-wp-rest-server.php(1028): WP_REST_Server->respond_to_request()
#11 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api.php(535): WP_REST_Server->dispatch()
#12 /var/www/vhosts/critic.uk/httpdocs/wp-includes/rest-api.php(2889): rest_do_request()
#13 [internal function]: rest_preload_api_request()
#14 /var/www/vhosts/critic.uk/httpdocs/wp-includes/block-editor.php(634): array_reduce()
#15 /var/www/vhosts/critic.uk/httpdocs/wp-admin/edit-form-blocks.php(77): block_editor_rest_api_preload()
#16 /var/www/vhosts/critic.uk/httpdocs/wp-admin/post.php(187): require(‘…’)
#17 {main}
thrown