Hello friends.  I just installed DREAMHOUSE App and I was trying to access any PROPERTY, when I got this message "Unfortunately, there was a problem. Please try again. If the problem continues, get in touch with your administrator with the error ID shown here and any other related details. Error ID: 120013661-373515 (473429469)".   

I installed and unistalled Dreamhouse as part of the exercises of the Trailhead, not sure if this is the reason of the issue.  Thank you for any help !!