Failed to load viewstate

Failed to load viewstate

Only 1 computer is throwing this error on Service Center:

Failed to load viewstate.  The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.  For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

The user did logoff and rebooted the machine.
Did you have this experience before?
Thank you
Hi Carolina,

Is this error happening in production or in a development environment?

This happens when the page in your server is no longer valid for your client information (browser view state) - may be common in development between publishes.
If you have it in production, the code may not be equal between the frontends.