joined:June 10, 2008
So I had a client update their website which is built in .net and now I get this whenever I try to execute an aspx page.
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.
I DID do research before I posted here so please don't post any links about changing the <pages> section of my web.config because I already tried it. Does anyone have any ideas about how I can troubleshoot this?
Couple tid bits. This is a stand alone Win 2k8 r2 server running .net 3.5 (although I think the site still works on 2. something) Any thoughts?