Hi,
I'm getting the same error after updating.
Fatal error: Uncaught Error: Class 'MetaBox\Updater\Option' not found in /home/hubixpl/domains/hubix.pl/public_html/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/BaseEditPage.php:131 Stack trace: #0 /home/hubixpl/domains/hubix.pl/public_html/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/BaseEditPage.php(124): MBB\BaseEditPage->get_updater() #1 /home/hubixpl/domains/hubix.pl/public_html/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/BaseEditPage.php(69): MBB\BaseEditPage->is_license_active() #2 /home/hubixpl/domains/hubix.pl/public_html/wp-includes/class-wp-hook.php(324): MBB\BaseEditPage->add_meta_boxes(Array) #3 /home/hubixpl/domains/hubix.pl/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #4 /home/hubixpl/domains/hubix.pl/public_html/wp-content/plugins/agency-base/vendor/meta-box/meta-box/inc/core.php(49): apply_filters('rwmb_meta_boxes', Array) #5 /home/hubixpl/domains/hubix.pl/public_html/wp-includes/class-wp-hook.php(324 in /home/hubixpl/domains/hubix.pl/public_html/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/BaseEditPage.php on line 131
Metabox v. 5.9.11
Metabox AIO v. 1.28.0