SecureAuth IdP Version - All
invalid viewstate error when accessing a SecureAuth realm. The error mentions "ensure that <machineKey> configuration specifies the same validationKey and validation algorithm.
Cause - The <machineKey> section is significantly different between the two load balanced servers.
The machine key in the Token Settings page is not the same and they should match on both server.
Copy and paste the machinekey from the Primary box over to the one getting the error message so that they match.