Hello!

sorry about the late reply, I was helping at a Joomla workshop in Long Island, New-York most of the day.

First, one thing is clear: you cannot edit a contact if that contact is associated with more than one user. This is a system limitation, not a limitation of Trombinoscope. It would actually make no sense for a user to have several contact information sheets. You are or you are not the same person as the user selected.

Second, you not only need to enable the plugin 'edit contact in profile', packaged with the component, you also need to select, in that plugin, which fields you want to show. None of them is selected by default.

Is that what you forgot to do? If you get the warning on multiple users, then it tells me the plugin works just fine and goes to the point where it checks if there are any enabled fields. If it shows nothing, then none of the fields has been selected in the plugin. I am guessing, but it seems like it is what is happening.