Title: Critical error
Last modified: August 27, 2026

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# Critical error

 *  Resolved [blacklotusnovels](https://wordpress.org/support/users/blacklotusnovels/)
 * (@blacklotusnovels)
 * [3 weeks ago](https://wordpress.org/support/topic/critical-error-880/)
 * the **Publisher add-on** (`series_im_admin_main.php`) is causing a fatal error
   on WordPress 7.1, where it passes a `WP_Error` object instead of a string to `
   esc_url()`.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Steve Burge](https://wordpress.org/support/users/stevejburge/)
 * (@stevejburge)
 * [3 weeks ago](https://wordpress.org/support/topic/critical-error-880/#post-19004456)
 * Hi [@blacklotusnovels](https://wordpress.org/support/users/blacklotusnovels/).
   Thanks for using PublishPress Series. The PublishPress add-on was retired years
   ago. It’s now part of PublishPress Series Pro.
 *  Plugin Author [Steve Burge](https://wordpress.org/support/users/stevejburge/)
 * (@stevejburge)
 * [2 weeks, 1 day ago](https://wordpress.org/support/topic/critical-error-880/#post-19009934)
 * Thanks for using PublishPress. We’ve not see any replies in a week so are closing
   this ticket for now. Please post back if you have more questions.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * ![](https://ps.w.org/organize-series/assets/icon-256x256.png?rev=3386599)
 * [Issues and Series for Newspapers, Magazines, Publishers, Writers](https://wordpress.org/plugins/organize-series/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/organize-series/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/organize-series/)
 * [Active Topics](https://wordpress.org/support/plugin/organize-series/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/organize-series/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/organize-series/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [Steve Burge](https://wordpress.org/support/users/stevejburge/)
 * Last activity: [2 weeks, 1 day ago](https://wordpress.org/support/topic/critical-error-880/#post-19009934)
 * Status: resolved