It could really be a system glitch.
You can try later but, before you do, suggest deleting your web browser's cookies, temp files and histoy. Next, close the browser, reopen it and retry.
If nothing changes, suggest contacting customer support direct for assistance.
Also, is this a regular debit card or a prepaid type as there are differences?
Prepaid cards can be issues unless you can register both a name and address with the card issuer. This information must also match exactly the name and address you use to setup your PayPal Account.
