This message is shown when our Chrome extension can't verify a relationship between the person you chose to make the introduction, and the person you'd like to meet.
It will appear in the following circumstances:
If you use the "swap" functionality
In some circumstances when using preferred or recent connectors
When you add a 2nd or 3rd degree connection on LinkedIn as the person making the introduction
We recently changed our Chrome extension to now allow you to request an intro to anybody, from anybody.
This change comes because we heard from our users that the LinkedIn relationship graph is not an accurate representation of their own individual networks.
As a result, we needed to give our users the capability to ask for intros from all of the people in their real-life relationship graph, so they are able to use our platform to fully manage their relationship-led growth.
Ultimately, it's up to the person making the request to know what is appropriate when asking someone for an introduction.