DNA.Land posted this to their Facebook page:
Dear DNA.Land users,
Thanks for helping testing our website in this beta phase. We understand that several users expected to have close matches (e.g. parent, duplicate sample, etc...) but had an empty relative finder report. We would like to get as many examples as we can have, so we can better understand the issue. Right now, these issues are scattered in multiple posts responses.
If this is OK with you, please send us a private Facebook message with as many details as possible (why you expect to have a relative match, who is the other person, emails, etc). Please start the message with the following line: '=match empty=' so we can flag your message as connected to this issue.
We will do our best to fix these issues in a timely manner. We highly appreciate your help and time to improve DNA.Land!
Thanks a lot,
Jie Yuan and Dr. Yaniv Erlich
https://www.facebook.com/knowyourgenome