Invite not sent

I sent an invite to a friend and it looks all good on my end but he's not received anything. Spam buckets all checked too. :)

What (secure) info can I give you that will help you track this down?

The issue mentions only a missing friend invitation and provides no file, test, service, or entry point. Start by identifying the invitation-sending and delivery path, using secure diagnostic details requested from the reporter; done means locating the failure and documenting a reproducible fix or confirmed cause.

Written by the indexing model from the issue text.