Animate closes with the following message: Unknown error; quit application

[rogerc7243666]

Animate assets cannot be viewed or downloaded, when I point to download, Animate closes with the following message: Unknown error; quit application

[kglad]

that looks like you're trying to load a corrupted fla file.

if that occurs only when you try to open that specific file, try to repair it:

rename it to a rar

use winrar to repair it

rename the repaired rar to a fla

retry opening the fla

if that fails (expected most of the time), open AutoRecoverFilenames.txt* and see if there was a saved file and, if so, check the folder location listed

*

win:

C:\Users\<username>\AppData\Local\Adobe\<animate version>\en_US\Configuration

mac:

Users/<username>/Application Support/Adobe/<animate/flash version>/en_US/Configuration/

p.s  in the future, save your work periodically with increasing version number appended. for example, for project1.fla, save as project1_v000.fla, project1_v001.fla etc.  close and reopen the latest version to confirm it's uncorrupted.  only then can you delete the previous versions.  (and don't save over that confirmed version.)

[rogerc7243666]

Thanks for your message. The problem persists with new files, not previously saved. I have the feeling that it is a problem of some error between Animate and Creative Cloud...

[kglad]

if it's occurring with all fla files, reset your preferences -

https://helpx.adobe.com/animate/kb/animate-cc-crashes-on-launch-startup.html

or remove

Win:

C:\Users\<username>\AppData\Local\Adobe\Animate CC <version>\ and

C\Users\<username>\AppData\Roaming\Adobe\Animate\<version>\

Mac:

/Users/<username>/Library/Application Support/Adobe/<Animate CC version>/ and /Users/<username>/Library/Preferences/Adobe/Animate/<version>/) 

[rogerc7243666]

Unfortunately this doesn't fix the problem either, also reinstall Animate and try changing the user preferences (Write-Read Animate). My libraries do synchronize, the problem is only in the Assets.