cloud-preview.vadesecure.com has no AAAA records.
Question and response
Question
dig cloud-preview.vadesecure.com. AAAA
Answer
The response has no answer records.
Authority
cloud-preview.vadesecure.com. 900 SOA ns-170.awsdns-21.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0