Hi DNN Champs,

I login to one page and open same home page in another tab.
Now I have same home page opened in two tab of Firefox browser.
I logged out from one page and go to other page which is already opened in another tab and search some thing there (My search is anonymous and does not required user to login the page for searching), but I got error :

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

Note: I am not using any web farm and website is hosted on localmachine.

can anyone please provide me solution of this problem. Thanks in Advance.