Title: Fatal Error on Saving Last modified: January 22, 2026 --- # Fatal Error on Saving * [8persap](https://wordpress.org/support/users/8persap/) * (@8persap) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/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 6.9Active 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} thrown Viewing 5 replies - 1 through 5 (of 5 total) * Plugin Author [photonicgnostic](https://wordpress.org/support/users/photonicgnostic/) * (@photonicgnostic) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18795526) * Could you share the Request URL you entered for that Bookshelf? * Thread Starter [8persap](https://wordpress.org/support/users/8persap/) * (@8persap) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18795948) * Thanks for the quick reply. [https://portsmouth.spydus.co.uk/api/swagger/archives/swagger.json?urls.primaryName=Spydus+Archives+API](https://portsmouth.spydus.co.uk/api/swagger/archives/swagger.json?urls.primaryName=Spydus+Archives+API) I’ve tried a few different ones from here (there’s a drop down top right) but the same thing happened with each. Let me know if you need anything else. Thanks. * Plugin Author [photonicgnostic](https://wordpress.org/support/users/photonicgnostic/) * (@photonicgnostic) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18796078) * At the moment the plugin does not support the Civica API, but I’m trying to work with Civica to implement this feature. * Thread Starter [8persap](https://wordpress.org/support/users/8persap/) * (@8persap) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18797989) * thanks for the reply. It’s Spydus. I mentions on the WordPress page that is an option? * Plugin Author [photonicgnostic](https://wordpress.org/support/users/photonicgnostic/) * (@photonicgnostic) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18798390) * At the moment you can select Spydus in the plugin settings and manually enter ISBNs into a Bookshelf post. Viewing 5 replies - 1 through 5 (of 5 total) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-on-saving%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. * ![](https://ps.w.org/library-bookshelves/assets/icon-256x256.png?rev=1720814) * [Library Bookshelves](https://wordpress.org/plugins/library-bookshelves/) * [Frequently Asked Questions](https://wordpress.org/plugins/library-bookshelves/#faq) * [Support Threads](https://wordpress.org/support/plugin/library-bookshelves/) * [Active Topics](https://wordpress.org/support/plugin/library-bookshelves/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/library-bookshelves/unresolved/) * [Reviews](https://wordpress.org/support/plugin/library-bookshelves/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 5 replies * 2 participants * Last reply from: [photonicgnostic](https://wordpress.org/support/users/photonicgnostic/) * Last activity: [4 months, 2 weeks ago](https://wordpress.org/support/topic/fatal-error-on-saving/#post-18798390) * Status: not resolved