No audio from speakers in Zoom Settings

I have a Dell laptop and when I Go to Zoom Settings > Audio and test the Speaker I cannot get any audio from my USB headsets or the Dell laptop built-in speaker. The microphone works and the Dell Speakers built-in speakers are working because I can test the speakers / USB headsets on Skype with no issues. 

I reached out to Dell but they have advised me that as the speakers are working correctly outside the Zoom app and the issue appears only to be with Zoom that I should reach out to the Zoom Communuity to see if anyone has experienced similar issues and knows if there is anything I need to change in the Zoom app itself

I hope someone out there is able to offer some advise