Unfortunately, the DreamFactory UI doesn’t automatically detect whether or not your column name has spaces - it will allow you to enter them as is.
I encountered this after creating a new table, adding columns, creating one column called “Phone number”
I went to the Data tab, and tried to load the (empty) table, and an error occurred - it complained about a missing “Phone” column. I immediately realized that it was referring to the “Phone number” column and that I had mistakenly used spaces in it. So, I went back and changed it.