title: Can't acces formik.errors with Yup and array of object
body: <p>When I console.log &quot;formik.errors&quot; I have:</p>
  <pre class="lang-js prettyprint-override"><code>Array [ {…} ]
  0: Object { firstName: &quot;First name is required&quot;, lastName: &quot;Last name is required&quot;, email: &quot;Invalid email&quot;, … }
  email: &quot;Invalid email&quot;
  firstName: &quot;First name is required&quot;
  lastName: &quot;Last name is required&quot;
  password: &quot;Password is required&quot;
  </code></pre>
  <p>but when I try to access &quot;formik.errors.employee[0].email&quot; I have this error:</p>
  <pre><code>Property 'email' does not exist on type 'string | FormikErrors&lt;{ lastName: string; firstName: string; email: string; password: string; }&gt;'.
    Property 'email' does not exist on type 'string'.
  </code></pre>
  <p>Here is my yup schema:</p>
  <pre class="lang-js prettyprint-override"><code>Yup.object().shape({
    employee: Yup.array().of(
      Yup.object().shape({
        firstName: Yup.string().required('First name is required'),
        lastName: Yup.string().required('Last name is required'),
        email: Yup.string()
          .email('Invalid email')
          .required('Email is required'),
        password: Yup.string()
          .required('Password is required')      
      })
    ),
  </code></pre>
  <p>What is wrong with my schema ?</p>