Uninstall and reinstall PS CC 2014. This fixes images not showing up in PS for most people.
Solved my own problem. Well, found a solution on line... Seems like I needed to uninstall PS CC2014 and reinstall. Worked like a charm after that....
Thanks.... Just figured that out as well. But I appreciate the quick feedback!
I have the same issue in Windows 7.
I have tried re-installing and it does not work.
Dave Merchant's suggestion did not help because I am already up to date.
I am able to open the images via Bridge and photo merge from there.
Update: Bridge was opening CS6. I have removed CS6 and then removed and re-installed CC 2014. This still does not work.
I also tried to use the Photomerge tool in Photoshop directly and the result is the same. Nothing happens after the files are selected.