I see you asked this last night, was it a temporary technical glitch? Has the matter resolved itself today?
Sometimes a postcode is not written correctly, no space where there should be one or a 0 written when it should be a O.
If not resolved contact Customer Services today and report your findings.
This is the easiest and quickest way to contact eBay Customer Services, for a Call Back option.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open 8 a.m. - 10 p.m. on weekdays
9 a.m. - 6 p.m. on weekends.
Automated agents will be available on chat outside of the above hours.
I recommend contacting CS first thing in the morning as there's more chance of Dublin answering.
@sharonlef