I can no longer see my listings, I just have a blank page when I go in to view or edit them.
Me too! I guess etsy is doing something on the site.
Yes, Several Threads about this, as well as an Announcement from Etsy.
https://community.etsy.com/t5/Technical-Issues/FIX-IN-PROCESS-Listing-page-in-Shop-Manager-displayin...