Express validator issue:

I'm trying to use the express validator to validate some user input on a form. However, when I type in the input and hit submit I get header errors and my messages are not displayed. I also have a problem where all the input is not getting the validation rules I set below. Any thoughts? (This is not the whole code it runs fine but I had to edit out some things.) If you need more info please reach out I have been trying to figure this out for a bit.

const express = require('express');
const { response } = require('express');
const { check, validationResult } = require('express-validator');

registerController =
  ([
    check('fName')
      .exists({ checkFalsy: true })
      .isLength({ min: 3 })
      .trim()
      .escape()
      .blacklist({ chars: '{};\\\'"<>,d' })
      .withMessage('Name must be 3 letters long'),
    check('lName')
      .exists({ checkFalsy: true })
      .isLength({ min: 3 })
      .trim()
      .escape()
      .blacklist({ chars: '{};\\\'"<>,d' })
      .withMessage('Name must be 3 letters long'),
    check('email')
      .exists({ checkFalsy: true })
      .isEmail()
      .normalizeEmail({ lowercase: true })
      .blacklist({ chars: '{};\\\'"<>,' })
      .withMessage('Please use a valid email'),
    check('userName')
      .exists({ checkFalsy: true })
      .isLength({ min: 5 })
      .trim()
      .escape()
      .blacklist({ chars: '{};\\\'"<>,' })
      .withMessage('username must be at least 5 letters long'),
    check('password1')
      .exists({ checkFalsy: true })
      .matches(/\d/)
      .isLength({ min: 8 })
      .trim()
      .escape()
      .blacklist({ chars: '{};\\\'"<>,' })
      .withMessage('Password must be 8 characters long and contain numbers'),
    check('password2')
      .exists({ checkFalsy: true })
      .matches(/\d/)
      .isLength({ min: 8 })
      .trim()
      .escape()
      .blacklist({ chars: '{};\\\'"<>,' })
      .withMessage('Password must be 8 characters long and contain numbers'),
  ],
  async (req, res) => {
    const errors = validationResult(req);
    let error = [];

    if (!errors.isEmpty()) {
      errors.array().forEach((err) => {
        console.log(errors);
        error.push({ message: err.msg });
      });
      res.render('loginRegister', { error });
    }
  });

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