Error 1064: You have an error in your SQL syntax; (no replies)

I spent 2 hours trying to fix it but I couldn't find any solution
------- SQL SCRIPT -------------
-- MySQL Workbench Forward Engineering

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------
-- -----------------------------------------------------
-- Schema hospital_tess
-- -----------------------------------------------------

-- -----------------------------------------------------
-- Schema hospital_tess
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `hospital_tess` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci ;
USE `hospital_tess` ;

-- -----------------------------------------------------
-- Table `hospital_tess`.`patient`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`patient` (
`patient_id` INT NOT NULL,
`patient_address` VARCHAR(45) NULL,
`patient_name` VARCHAR(45) NULL,
`patient_date_admitted` VARCHAR(45) NULL,
`patient_sex` VARCHAR(25) NULL,
PRIMARY KEY (`patient_id`))
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8mb4
COLLATE = utf8mb4_0900_ai_ci;


-- -----------------------------------------------------
-- Table `hospital_tess`.`doctor`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`doctor` (
`doctor_id` INT NOT NULL,
`doctor_fname` VARCHAR(45) NULL,
`doctor_lname` VARCHAR(45) NULL,
`doctor_department` VARCHAR(45) NULL,
PRIMARY KEY (`doctor_id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `hospital_tess`.`bill`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`bill` (
`bill_id` INT NOT NULL,
`bill_amount` DOUBLE NULL,
`bill_copay` DOUBLE NULL,
`bill_date_sent` VARCHAR(45) NULL,
`bill_status` VARCHAR(45) NULL,
PRIMARY KEY (`bill_id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `hospital_tess`.`Visit`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`Visit` (
`visit_id` INT NOT NULL,
`patient_id` INT NULL,
`doctor_id` INT NULL,
`bill_id` INT NOT NULL,
PRIMARY KEY (`visit_id`, `bill_id`),
INDEX `fk_Visit_bill1_idx` (`bill_id` ASC) INVISIBLE,
CONSTRAINT `patient_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`patient` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `doctor_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`doctor` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Visit_bill1`
FOREIGN KEY (`bill_id`)
REFERENCES `hospital_tess`.`bill` (`bill_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `hospital_tess`.`insurance`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`insurance` (
`ins_id` INT NOT NULL,
`ins_name` VARCHAR(45) NULL,
`ins_phone` INT NULL,
PRIMARY KEY (`ins_id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `hospital_tess`.`payment`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`payment` (
`pay_id` INT NOT NULL,
`pay_date` DATETIME NULL,
`pay_method` VARCHAR(45) NULL,
PRIMARY KEY (`pay_id`),
CONSTRAINT `bill_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`bill` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `patient_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`patient` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `ins_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`insurance` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;





--------****-*-*-*--*-*-*-*-*-*--*-*-*-*-*--*-*--*-*-*-*-*-ERROR Log --------****-*-*-*--*-*-*-*-*-*--*-*-*-*-*--*-*--*-*-*-*-*-
Executing SQL script in server
ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')
REFERENCES `hospital_tess`.`patient` ()
ON DELETE NO ACTION
ON UPD' at line 12
SQL Code:
-- -----------------------------------------------------
-- Table `hospital_tess`.`Visit`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `hospital_tess`.`Visit` (
`visit_id` INT NOT NULL,
`patient_id` INT NULL,
`doctor_id` INT NULL,
`bill_id` INT NOT NULL,
PRIMARY KEY (`visit_id`, `bill_id`),
INDEX `fk_Visit_bill1_idx` (`bill_id` ASC) INVISIBLE,
CONSTRAINT `patient_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`patient` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `doctor_id`
FOREIGN KEY ()
REFERENCES `hospital_tess`.`doctor` ()
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Visit_bill1`
FOREIGN KEY (`bill_id`)
REFERENCES `hospital_tess`.`bill` (`bill_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB

SQL script execution finished: statements: 8 succeeded, 1 failed

Fetching back view definitions in final form.
Nothing to fetch