strange problem when to install several desk environments

[yufeiluo]

I have installed several gui :lxde , xfce4 , gnome3.
After reboot ,cryptkeeper can't decode directory ,the error info is
The stash could not be mounted. Invalid password?
To purge and reinstall cryptkeeper,same error info occur when to decode directory.
The stash could not be mounted. Invalid password?

How to fix it?