"Trying to get property 'plugin' of non-object" after upgrade to metabox 5.x

plugins/meta-box/inc/update/checker.php

ErrorException (E_NOTICE)
Trying to get property ‘plugin’ of non-object

/**
 * Check if a plugin has an update to a new version.
 *
 * @param object $plugin_data The plugin update data.
 *
 * @return bool
 */
private function has_update( $plugin_data ) {
    $plugins = get_plugins();

    return isset( $plugins[ $plugin_data->plugin ] ) && version_compare( $plugins[ $plugin_data->plugin ]['Version'], $plugin_data->new_version, '<' );
}

Hi, wordpress backoffice inaccessible due a invalid object: $plugin_data->plugin