kuAuT and fragile dog:
My GN4 was slowing down and draining quickly. Among other things like uninstalling apps, I cleared the cache and backups for my photos, only to have problems like the above post.... I found this page, and used both of your solutions... Opened both apps in App Info, cleared the data, disabled and re-enabled them, then completely powered down and rebooted. Problem fixed. I wanted to take the time to thank both of you, since the original poster failed to do so... So.... THANK YOU!!!