There is a known bug where attempting to schedule things at a location that has been "blocked" will result in the eternal spinner.
I'd suggest switching to "week view", unchecking all your calendars, and then checking just that one location. That will allow you to see all events and restrictions set for that building.
Have you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
So we can better help you, please edit your
Profile to include your general location.