Latest Version throwing wp_mail Issue

I have already started a support ticket with Post SMTP. You can find that here, https://wordpress.org/support/topic/mailer-type-warning/.

I figured I should also bring it to your attention to so that we could try to track down what is happening. I have tested this on a very fresh WordPress v6.5.3 install that just has Post SMTP and this plugin installed. Post SMTP is set up to be the default settings so there is no customizations done to that yet, nor any customizations to the Popup Builder.

When just Post SMTP is active, there is no error message. When I activate Popup Builder I get the following error code:

Postman: wp_mail has been declared by another plugin or theme, so you won’t be able to use Postman until the conflict is resolved.

Which I find strange as to why is Popup Builder declaring wp_mail?