Alfresco - view state cannot be reconstructed
This is a very familiar exception for Alfresco users,
Cause:
There are a lot of reasons for this exception and is noticed in Alfresco Explorer. The causes for this vary from
1. User session expiry,
2. applying amp file,
3. UI customizations
4. Wrong configs etc.
As per Alfresco, this is a message/exception "specially for developers". And for those who wants the details needs to refer the system logs on where it went wrong.. However few of the issues causing these has been fixed in 4.1x version of Alfresco.