Hi there! I have also received the "Confirmation of documents received and next steps" email, but no specific invitation to an open house. Although in the email they say "Sign up for a campus visit or special campus events", there is not a Psychology open house available in the calendar.
About the transcript I was about to send it to them in November when I saw it was not needed in the website. So I contacted both admissions and the department and they said I should just upload the unofficial one. Since the option was not available to me online, I had to call and ask them to make it available, which they did.