Error Message thrown

Hi there @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?

Hi @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
Default FROM address:
Default Reply-To address:
Bounce Email Address:
Total number of subscribers: 1
Plugin installed at: 2022-02-07 11:02:45`

Hi @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

Hi @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

Hi Elvira @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?

Dear Elvira @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

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!