keenmouse I have just freshly installed mailcow. Here’s what’s happening in SOGo (Version 5.2.0 (@shiva2.inverse 202110300036)): In Calendar, I click to create a new event. I click in the Invite Attendees field and start typing. I select an attendee. The Create Event dialog disappears and the page reloads. Anyone else having this problem or resolved it? Thanks in advance.