403 Forbidden Error When Using Elementor 

First you should try to whitelist the action in Wordfence: 

1. Go to Wordfence > All Options
2. Go to the Whitelisted URLs section
3. Enter /wp-admin/admin-ajax.php in the URL box
4. Select Param Type: POST Body for the dropdown
5. Enter actions for the Param Name
6. Click the Add button
7. Click Save Changes in the top right corner