If you need to replace the Forgot Password Core Page template, copy and paste the code below into a Custom HTML block of the WordPress Editor.
[MM_Form type='forgotPassword']
<div class="mm-forgot-password">
[MM_Form_Message type='error']
[MM_Form_Message type='success']
<h3>Enter your email address below</h3>
[MM_Form_Field name='email']
[MM_Form_Button type='submit' label='Submit']
</div>
[/MM_Form]