Please help wit this unit.

Use Schema Builder to create a custom field for the Property object
DreamHouse brokers often visit properties with their clients. They want to see on the property record where the property is located. Use Schema Builder to add a street address field to the Property object.
Field data type: Text Area
Field label: Street Address
Always require a value in this field in order to save a record: Selected


Result: Challenge Not yet complete... here's what's wrong: 
The field 'Street_Address__c' either does not exists on the Property__c object or it is not of type textarea.


I have completed all the steps listed but still getting this same result. Any ideas?