There have been similar reports from other member from the past few days, so you're not alone.
I have tagged 2 Community Managers to ask if this is a technical issue, when I get a reply, I'll come back to you.
In the meantime which device and browser are you using? If the app or mobile browser, then switch if you can to a PC / laptop and use Chrome or Firefox they work best with eBay, and try from there, it might help.
Some reports coming through with this error, are from users of Mac or Safari, so may be worth changing devices and / or browsers see if it helps.
