Fatal Error on Saving

Hi. I’m getting this fatal error when saving a Book Shelf:

Hi. I’m getting this fatal error when saving a Book Shelf:

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.9
Active theme: Twenty Twenty-Five (version 1.4)
Current plugin: Library Bookshelves (version 5.11)
PHP version 8.3.28 Error Details

An error of type E_ERROR was caused in line 1393 of the file /home/growwthuk/sandbox.growwth.uk/wp-content/plugins/library-bookshelves/functions.php. Error message: Uncaught TypeError: explode(): Argument #2 ($string) must be of type string, array given in /home/growwthuk/sandbox.growwth.uk/wp-content/plugins/library-bookshelves/functions.php:1393
Stack trace: 0 /home/growwthuk/sandbox.growwth.uk/wp-content/plugins/library-bookshelves/functions.php(1393): explode() 1 /home/growwthuk/sandbox.growwth.uk/wp-content/plugins/library-bookshelves/class-bookshelves-post-type.php(282): lbs_get_items_from_api() 2 /home/growwthuk/sandbox.growwth.uk/wp-includes/class-wp-hook.php(343): Bookshelves->save_bookshelf() 3 /home/growwthuk/sandbox.growwth.uk/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters() 4 /home/growwthuk/sandbox.growwth.uk/wp-includes/plugin.php(522): WP_Hook->do_action() 5 /home/growwthuk/sandbox.growwth.uk/wp-includes/post.php(5183): do_action() 6 /home/growwthuk/sandbox.growwth.uk/wp-includes/post.php(5296): wp_insert_post() 7 /home/growwthuk/sandbox.growwth.uk/wp-admin/includes/post.php(453): wp_update_post() 8 /home/growwthuk/sandbox.growwth.uk/wp-admin/post.php(227): edit_post() 9 {main}
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