We're going to need some more information.
Which domain are you testing? What's the link to your file?
Here is my information:
Could not grab the file via IPv6 HTTP
[Reset Test]
Help Step Description Data
[1] Generate a User Code vmm65uqk2f
[2] Tell us what your IPv6 website is; FQDN please
http://applemelon.info /
[3] We will test grabbing the file:
http://applemelon.info/vmm65uqk2f.txt [4] Schedule the test:
I've tried a lot of times testing it, but it won't work.