Validation of viewstate MAC failed on 1st Time in Login Page.
I have using ASP .Net C# application. In Login Page for 1st time this issue arises and after refresh the page the error is goes out. The error get on browser Console.I googling on that and already added the MAC Key in web config but no result found.
The Below Issue Found :
"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".