How to Invite Guests to Event on Airbnb

[Kaleigh2]

Hello! I reserved a home in Reykjavik and successfully added 4 other guests to the reservation. We then booked tickets to Blue Lagoon (not through Airbnb) and now I want to add this event to our trip on Airbnb. 

However, when I navigate to Trips --> Reykjavik --> Sunday --> Add an event, there is no option to Invite a Guest (strangely, though, one of my guests has this option when creating events). Instead, the bottom of the pop-up window reads "Only visible to you."

Does anyone know how I can share an event on Airbnb with my other guests?