I'm admin of a company with an enterprise plan. I would like to share a board and inivite a specific guest as editor. I've read the articles about collaborating with guests and set the team settings to "allow guests". Still the invitation doesn't work, I always keep getting the popup message that I have to add the person to my team. But I just want this person to be guest on the board (as editor, not only for commenting) and not to be part of my whole team. Am I missing something? Are there further settings that need to be changed?

I’m admin of the whole company, so I have access to all the settings.