Marketplace unavailable in BETA

Summary
The Marketplace and previous purchases are not loading in the 1.16.0.61 BETA. The "Marketplace" button is greyed out and an error is shown (screenshot below)

Some have reported seeing "Error 0"

Original description:
XBOX ONE - UNSURE ABOUT OTHER CONSOLES: appears that noone is able to use thier marketplace purchases and/or access the marketplace. Message shows "marketplace unavailable"