I don't see your error dialogue.
The "Cloud Sync" reference is significant. Have you stored the AD samples in your Cloud? How were your projects saved (per project folders, CWB if they're still available)? Was the full project data saved in your cloud, or just the project files, with the WAVs elsewhere?
Also, 8Gb of RAM SHOULD be enough to run most projects, but AD can load a lot of samples. What else do you have running, both within and outside of the project? You could be overtaxing your system. Just a thought...