WordPress データベースエラー: [Unknown character set: 'utf8mb4_general_ci']
CREATE TABLE wp_bwpup_backups ( id bigint(20) unsigned NOT NULL AUTO_INCREMENT, destination varchar(255) NOT NULL default '', filename varchar(255) default NULL, job_id bigint(20) unsigned NULL default NULL, status varchar(255) NOT NULL default '', error_code varchar(32) NULL default NULL, error_message longtext NULL default NULL, logfile varchar(255) NULL default NULL, backup_trigger varchar(32) NOT NULL default '', modified timestamp NOT NULL default '0000-00-00 00:00:00', submitted_at timestamp NULL, PRIMARY KEY (id), KEY modified (modified), INDEX `destination` (`destination`(191)), INDEX `error_code_index` (`error_code`(32)) ) DEFAULT CHARACTER SET utf8mb4_general_ci