I upgraded to the latest version of MB (5.10.3) and AIO (1.30.4), and things are amiss. All related to AIO 1.30.4, as far as I can tell. I can no longer export items. Sites that have not been upgraded are working as expected, but rolling back does not seem to help.
Error Details
=============
An error of type E_ERROR was caused in line 73 of the file /srv/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-custom-post-type/src/Export.php. Error message: Uncaught TypeError: strlen(): Argument #1 ($string) must be of type string, array given in /srv/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-custom-post-type/src/Export.php:73
Stack trace:
#0 /srv/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-custom-post-type/src/Export.php(73): strlen(Array)
#1 /wordpress/core/6.6.2/wp-includes/class-wp-hook.php(324): MBCPT\Export->export('')
#2 /wordpress/core/6.6.2/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#3 /wordpress/core/6.6.2/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /wordpress/core/6.6.2/wp-admin/admin.php(175): do_action('admin_init')
#5 /wordpress/core/6.6.2/wp-admin/edit.php(10): require_once('/wordpress/core...')
#6 {main}
thrown
In at least one case, field values are not displayed on the post type name (plural and single), and the post titles are no longer shown in the post list (apparently a conflict with Admin Column Pro). I tried rolling back, but that was only partially successful.