Title: Error Message thrown Last modified: March 24, 2022 --- # Error Message thrown * Resolved [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/) * Notice: unserialize(): Error at offset 824 of 3624 bytes in /var/www/vhosts/mk6qdxzn. web8.alfahosting-server.de/3neu.feng-shui-flow.com/wp-content/plugins/mailpoet/ lib/Doctrine/Types/SerializedArrayType.php on line 27 * Hi there, * I found my problem mentioned in this thread. It also happened after restoring a backup. Re-installing the plugin via FTP didn´t change a thing. * [https://wordpress.org/support/topic/error-message-thrown/](https://wordpress.org/support/topic/error-message-thrown/) * Could you please advise what else to do? * Thanks! * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-message-thrown-2%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Support [Kel C. a11n](https://wordpress.org/support/users/kellymetal/) * (@kellymetal) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15494945) * Hi there [@justnice86](https://wordpress.org/support/users/justnice86/), * I see another report of this same “Notice: unserialize(): Error at offset in ******/ lib/Doctrine/Types/SerializedArrayType.php” error in our support system, and in that user’s case they resolved the issue by deactivating a separate “Bounce Handler” plugin that they had installed. * Do you have a Bounce Handler add-on currently active on your site? If so, please try deactivating it and see if that clears out that Notice. * Please let me know how that goes, or if you have any questions! * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15494963) * Hi there [@kellymetal](https://wordpress.org/support/users/kellymetal/), * no, I don´t have a bounce handler. The error definitely has something to do with the restoring. I have a copy of this website where everything works fine. * What approach results from the knowledge that it is a restoring problem that is not solved by reinstalling the plugin via FTP? * Plugin Support [Gui A. a11n](https://wordpress.org/support/users/guicmazeredo/) * (@guicmazeredo) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15507504) * Hi there [@justnice86](https://wordpress.org/support/users/justnice86/), * That’s hard to say. When you reinstall MailPoet, all files and database tables should be reinstalled, fixing this issue. * Can you please confirm that you followed [these steps to reinstall it](https://kb.mailpoet.com/article/258-re-installing-updating-the-plugin-via-ftp)? * If so, can you please send us a copy of your **System Info** found in _Settings > Help_? * **Please make sure to remove your email address before pasting it here**. * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15509279) * Hi [@guicmazeredo](https://wordpress.org/support/users/guicmazeredo/), * I followed all steps of the tutorial because I read it before trying anything else. My webmaster lately changed the settings so that the error isn´t visible on the frontend, but I still see it in the backend. * I wonder why the exact localization of the error does not provide any information for the solution? * PHP max_execution_time: 900 PHP memory_limit: 768M PHP upload_max_filesize: 256M PHP post_max_size: 256M WordPress language: de_DE Multisite environment?: No Current Theme: Kadence Child (version 1.0.0) Active Plugin names: query-monitor/ query-monitor.php, polylang/polylang.php, ewww-image-optimizer/ewww-image-optimizer. php, kadence-blocks/kadence-blocks.php, kadence-starter-templates/kadence-starter- templates.php, loco-translate/loco.php, mailpoet/mailpoet.php, media-library- plus/maxgalleria-media-library.php, seo-by-rank-math/rank-math.php, updraftplus/ updraftplus.php, wp-optimize/wp-optimize.php Sending Method: MailPoet Sending Frequency: 25 emails every 5 minutes Send all site’s emails with: current sending method Task Scheduler method: WordPress Cron ping URL: [https://3neu.feng-shui-flow.com?mailpoet_router&endpoint=cron_daemon&action=ping](https://3neu.feng-shui-flow.com?mailpoet_router&endpoint=cron_daemon&action=ping) Default FROM address: Default Reply-To address: Bounce Email Address: Total number of subscribers: 1 Plugin installed at: 2022-02-07 11:02:45` * Plugin Support [Kel C. a11n](https://wordpress.org/support/users/kellymetal/) * (@kellymetal) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15535729) * Hi there, * I’ve found one other report of this “Notice: unserialize(): Error at offset” // Doctrine/Types/SerializedArrayType.php error * In that user’s case, they found that it was related to a specific form they had created on their site, and once they deleted the form, the error disappeared. * You could try duplicating any of your forms, and then deleting the originals, and see if that resolves the error on your site. (Although duplicating the form _may_ result in the same error with the new form, in which case recreating the form would be necessary) * Please let me know how that goes, or if you have any questions! * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 2 months ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15536032) * Hi [@kellymetal](https://wordpress.org/support/users/kellymetal/), * even though the forms I use are just modifications of the mailpoet forms, * I gave it try and deleted my forms from the posts and inserted a non modificated one. It doesn´t solve the problem. Maybe the details of the error help to find another approach? * ``` wp-content/plugins/mailpoet/lib/Doctrine/Types/SerializedArrayType.php:27 unserialize() wp-content/plugins/mailpoet/lib/Doctrine/Types/SerializedArrayType.php:27 MailPoet\D\T\SerializedArrayType->convertToPHPValue() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/AbstractHydrator.php:197 MailPoetVendor\D\O\I\H\AbstractHydrator->gatherRowData() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php:170 MailPoetVendor\D\O\I\H\ObjectHydrator->hydrateRowData() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php:85 MailPoetVendor\D\O\I\H\ObjectHydrator->hydrateAllData() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/AbstractHydrator.php:119 MailPoetVendor\D\O\I\H\AbstractHydrator->hydrateAll() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/AbstractQuery.php:505 MailPoetVendor\D\O\AbstractQuery->executeIgnoreQueryCache() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/AbstractQuery.php:472 MailPoetVendor\D\O\AbstractQuery->execute() wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/AbstractQuery.php:372 MailPoetVendor\D\O\AbstractQuery->getResult() wp-content/plugins/mailpoet/lib/Form/FormsRepository.php:30 MailPoet\F\FormsRepository->findAllNotDeleted() wp-content/plugins/mailpoet/lib/PostEditorBlocks/SubscriptionFormBlock.php:48 MailPoet\P\SubscriptionFormBlock->MailPoet\P\{closure}() wp-includes/class-wp-hook.php:307 do_action('admin_head') wp-admin/admin-header.php:163 ``` * Plugin Support [Dani F. a11n](https://wordpress.org/support/users/danielinhou/) * (@danielinhou) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15568584) * Hi again [@justnice86](https://wordpress.org/support/users/justnice86/) 👋🏽, * This could also be due to a plugin or theme conflict. Can you switch your theme to a default one (Twenty Twenty) and disable all your plugins and see if MailPoet works? * If it does work, enable your theme and all your other plugins one after the other until MailPoet breaks again. You’ll be able to tell us what’s at fault. * You can refer to this article: [https://kb.mailpoet.com/article/204-how-to-test-for-plugins-conflict](https://kb.mailpoet.com/article/204-how-to-test-for-plugins-conflict) * I am asking this because I am unable to reproduce the error on my site. So please give it a try and let us know how that goes! * Cheers * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15577645) * Hi [@danielinhou](https://wordpress.org/support/users/danielinhou/), * chances were low because I have a duplicate website with the same theme and plugins and no errors. If you want to reproduce the issue you have to re-install a backup of the site, because that´s what produced the error. * Nevertheless, I installed the health plugin and did as recommended. The errors are still there. After the last posting here it increased to two error messages, * unserialize(): Error at offset 354 of 3157 bytes unserialize(): Error at offset 824 of 3624 bytes * Cheers * [Elvira K.](https://wordpress.org/support/users/treibalen/) * (@treibalen) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15598976) * Hi there [@justnice86](https://wordpress.org/support/users/justnice86/), * Thank you for testing! * Can you please check if you have `define('DB_CHARSET', 'utf8');` in your wp-config. php file? * It can cause issues if you have ‘utf8mb4’ set instead. * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15599923) * Hi Elvira [@treibalen](https://wordpress.org/support/users/treibalen/), * thank you for helping me. * Yes, the wrong code was in my wp-config. * define( ‘DB_CHARSET’, ‘utf8mb4’ ); * I´ve changed it to define( ‘DB_CHARSET’, ‘utf8’ ); * but the errors are still there. Do I have to fix anything else? * [Elvira K.](https://wordpress.org/support/users/treibalen/) * (@treibalen) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15608433) * Hi there [@justnice86](https://wordpress.org/support/users/justnice86/), * Thank you for checking! * I asked our developers to take a look and they came back with the following: * – are you restoring the backup on the same site or on a different one? Can you please ensure that the same database collation is used on the site where you do the restore? You can check that with your hosting. * – I see that you tried removing your forms, but can you please confirm that you tried completely deleting them from MailPoet > Forms and creating new ones? * – What tools do you use when restoring the backup? * Cheers! * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years, 1 month ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15608649) * Dear Elvira [@treibalen](https://wordpress.org/support/users/treibalen/), * yes, I can ensure that the same database collation is used. My hoster offers backups and I simply restored an earlier version from their server. In this case, I did not use any of my backuptools. * “I see that you tried removing your forms, but can you please confirm that you tried completely deleting them from MailPoet > Forms and creating new ones?” * The first thing I did was this [https://kb.mailpoet.com/article/258-re-installing-updating-the-plugin-via-ftp](https://kb.mailpoet.com/article/258-re-installing-updating-the-plugin-via-ftp) * I also removed the existing forms from my website and created and inserted new ones. Do you mean **anything else by deleting them from MailPoet**? * I do have a copy of the website in a different development state. I could restore that site with an earlier version from the hoster to see if the error also occurs. Please let me know if this might be helpful. * Cheers! * Thread Starter [justnice86](https://wordpress.org/support/users/justnice86/) * (@justnice86) * [4 years ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15663600) * Hooray, the update has solved my problem. Thank you! Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Error Message thrown’ is closed to new replies. * ![](https://ps.w.org/mailpoet/assets/icon-256x256.png?rev=3284564) * [MailPoet - Newsletters, Email Marketing, and Automation](https://wordpress.org/plugins/mailpoet/) * [Frequently Asked Questions](https://wordpress.org/plugins/mailpoet/#faq) * [Support Threads](https://wordpress.org/support/plugin/mailpoet/) * [Active Topics](https://wordpress.org/support/plugin/mailpoet/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/mailpoet/unresolved/) * [Reviews](https://wordpress.org/support/plugin/mailpoet/reviews/) * 13 replies * 5 participants * Last reply from: [justnice86](https://wordpress.org/support/users/justnice86/) * Last activity: [4 years ago](https://wordpress.org/support/topic/error-message-thrown-2/#post-15663600) * Status: resolved