I am working on the Admin Beginner Data Modeling trail "work with Schema builder" section and it provides the following instructions:

From Setup, search for and click Schema Builder in the Quick Find box.
In the left panel, click Clear All.
Check Contact, Favorite, Offer, and Property.

However, Schema Builder does not come up from search, or exploring. Any suggestions?

Getting an error The matching field you chose (Name) is not mapped and is required for an Update and Insert operation.
Any help how to fix this error Thankful  for any guidance