Problems to open and save documents in ProjectCoordinator

If  I click on a document, in ProjectCoordinator,  I can only save the document locally, I can not edit and save it directly to the portal.

If you have a PC and use Internet Explorer, you can install the DMK component.
When you go to Documents in ProjectCoordinator, there is a button *"Install DMK". *NOTE: This button is removed from version 3.0.2. 
Click the button and follow the onscreen instructions.

NOTE: To install and use the DMK component, you must use Windows and Internet Explorer.

Also remember to add your portal to Internet Explorer's Trusted Sites. See the topic: Internet Explorer block windows from ProjectCoordinator