I fixed this by backing up the portfolio gragh date several years until a graph appeared. Then I moved the date forward one month at a time for a few years and the graphing now works!
Same issue for me in Quicken 2017 Mac. I click the Investing link in the side bar and the Portfolio view shows the message "No holdings data available. Please add an investment account or import data to generate graph and table." despite the fact that I have several accounts. I have no problem seeing the Portfolio Value for each account, but the complete rollup throws that message.