Sitecore View State Access Denied

  Introduction:

While trying to complete the URL Redirect manager Post I faced an issue and had spend around 2 to 3 hours figuring out the problem (You might have solved this much faster than me) . But just to give an Idea on what I did to get this solved, I am writing this post.

When I Installed the package of "Constellation.Feature.Redirects" for (Sitecore 10.1.1) and published the same, I got couple of error for Dll (that will be covered in Sitecore Redirect manager Blog). When I successfully solved those, I started getting error for "View state"

Description:

The scenario is when you hit your URL for sitecore, you will be redirected to Identity server for Authentication (some people might receive this error message on Login itself). Once you put your login credentials you will be redirected to Home page to select Desktop, content Editor and so on (some might receive the error here). Once you click on Desktop you will then be free to select any thing, but mostly we click Content Editor. If you were successful till this stage, you might receive the error here. as shown below.

fig-1

Since I am having a stand alone set up, the highest I will have to grant permission is to the "IIS_IUSRS" (Right click on your Deployment folder shown below and go to properties.). 

fig-2

Follow the sequence as mentioned in the above figure. Once done Refresh your sitecore web page. If its a stand alone site, it should work.

In general there are given below access you need to grant as per the architecture.

1 - Users

2 - IIS_IUSRS

3 - NETWORK SERVICE

4 - NETWORK

(Will update if I remember more.)

Summary:

Thus it might help you solve View state access denied issue. Hope this is helpful.