Please use your Hosting cPanle > phpMyAdmin Database Manager, open the WordPress website database, click on the SQL Tab and execute this query:
ALTER TABLE `wdw_wc_users_voted` ADD COLUMN `post_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0, ADD COLUMN `date` INT(11) UNSIGNED NOT NULL DEFAULT 0, ADD INDEX `post_id` (`post_id`);
The red marked wdw_ part is our table prefix, if the table prefix is different you should change it. If you see an error, please copy and paste it here, then use this alternative SQL query:
ALTER TABLE `wdw_wc_users_voted` ADD `post_id` BIGINT NOT NULL AFTER `date`, ADD INDEX `post_id` (`post_id`);
