Fix Twitter Desktop applications only support the oauth_callback value oob

This document also applies to the error "Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings"

This issue usually occurs when your callback URL is wrong. Please check the address bar of your browser and ensure you're using the correct callback URL.

In the below photo you can see that we have a red line under https and www. your website might or might not have https or it might not be using www.

The best way to go about this is to copy the URL from your browser address bar while logged into your website dashboard and then make sure the URL ends like ours below with /wp-admin/admin.php