Hi there,
Sorry to hear about the trouble. We would like to know when exactly you have started experiencing this issue? Does this message comes up only when accessing the file stored in Document Cloud?
Try the following troubleshooting steps to see if that makes any changes:
1- Clear the cache and cookies of the web browser or try with a different web browser than the current one. Use the URL Adobe Document Cloud
2- Turn-Off internet security software for a while and try opening the document cloud website again.
[Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install or activate other software, you should re-enable it as soon as you're done.]
3- For testing, use Adobe Reader desktop application and see if that lets you access Document Cloud files and Export them.
4- If nothing works, then connect to a different network (hotspot or other wi-fi) and check back.
We would be looking forward to hear the update from you.
Thanks,
Akanchha