This is not a recent reported glitch or tech issue, so it seems the issue must lie at your end.
Which device or browser are you using?
If the app or mobile browser, switch if you can to a laptop / PC and use Chrome that seems to work best with eBay. Clear cache and cookies too.
If using the app there have been issue and eBay sent out this announcement.
https://community.ebay.co.uk/t5/Announcements/Updating-the-eBay-app-latest-version-guide-supported-o...
@mrgeeh