can't open pages documents from dropbox
iMac 4K, 21.5 inch, 2017
processor 3.4 GHz Intel Core i5
Memory 8GB 2400 MHz DDR4
macOS Sierra v 10.12.6
Can't open pages documents located in my Dropbox. I trashed & reinstalled my Dropbox app. , but it didn't solve the problem.
iMac, Mac OS X (10.6.8)