ev.preventDefault is not a function when using dispatch

I got something weird when I’m submitting a form.
When I’m using ev.preventDefault() as is, everything working as expected but when I’m adding dispatch to the function two lines later I’m getting the error: ev.preventDefault is not a function.
here are my code thanks in advance!

const addReview = async ev => {
  ev.preventDefault()
  if (!email || !message) return alert('All fields are required')
  await dispatch(addReview({email,message}))
  console.log('Adding review!');
}

<form onSubmit={addReview}>
  <input value={email} placeholder="Email" type="email" id="email" name="email" onChange={handleChange}/>
  <textarea
    name="message"
    placeholder="Message"
    rows="4"
    cols="50"
    onChange={handleChange}
    value={message}
  ></textarea>
  <button>Submit</button>
</form>