In case you had the previous okokBilling version (both ESX & QBCore) execute the code below in your database, otherwise ignore it.
DROPTABLE okokbilling;
Execute the following SQL code in your database:
CREATETABLE `okokbilling` (`id`intNOT NULL AUTO_INCREMENT,`ref_id`varchar(10) NOT NULL,`receiver_identifier`varchar(255) NOT NULL,`receiver_name`varchar(255) NOT NULL,`author_identifier`varchar(255) NOT NULL,`author_name`varchar(255) NOT NULL,`society`varchar(255) NOT NULL,`society_name`varchar(255) NOT NULL,`item`varchar(255) NOT NULL,`invoice_value`intNOT NULL,`fees_amount`intNOT NULL,`status`varchar(50) NOT NULL,`notes` LONGTEXT DEFAULT' ',`sent_date`varchar(255) NOT NULL,`limit_pay_date`varchar(255) NOT NULL,`paid_date`varchar(255) DEFAULTNULL,PRIMARY KEY (`id`));
Server artifacts
Make sure your server artifacts version is above the 5181.