Postman: wp_mail has been declared & MLFP

I am receiving the following error:
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.

It appears the plugin that triggers this is Media Library Folders Pro For WordPress – however – the author has shown that he does not believe it is calling on wp_mail anywhere (https://maxgalleria.com/forums/topic/media-library-folders-pro-wp_mail-error/#post-109284)

Is there some guidance you can provide for me to further troubleshoot this issue?