Error when loading page in .NET by Cache at client side

Hi,

Error when loading page in .NET by Cache at client side

Error

2] Inner Exception Type : System.Web.UI.ViewStateException
[3] Inner Exception : Invalid viewstate. Client IP: 10.0.1.9 Port: 48988 Referer: Application Link Path: Applicaion Path User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Firefox/52.0 ViewState: /wEPDwUJLTY3ODEwNTgyD2QWAgIDD2QWAgIID2QWBAIBDw8WAh4HVmlzaWJsZWhkZAIDDw8WAh4EVGV4dGVkZGSv6vVw4bz3tMu+5x5S7ZV+tUFMf3UabvKXwSOeVJWEdQ==
[4] Inner Source :
[6] Exception Type: System.Web.HttpException
[7] Exception : Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. See http://go.microsoft.com/fwlink/?LinkID=314055 for more information.


Solution:

Clear the all client side cache in browser or ask client to press CTRL + F5 to clear browser cache.
Error flees away.