interchange to audition
I follow exactly this intruduction in the newest premiere and audition. https://helpx.adobe.com/at/premiere-pro/how-to/send-sequence-audition-mixing.html
With previous versions I didn't have any problem working with it. In the 2018 version I only get the sum in audition!!!
You should still be able to send a sequence from Premiere to Audition via this method. Can you locate the XML file the process generates in the directory you selected and send it to firstname.lastname@example.org.
In the meantime, the latest release of Audition will let you open a PRPROJ file and import a sequence directly. You may want to try that for a better, faster experience.