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I am trying to decrypt v20 cookies in C#. Like it is done here And I am stuck on the 1st step already, on decrypting the app bound key.

var appBoundEncKeyB64 = JObject.Parse(localState)["os_crypt"]["app_bound_encrypted_key"].ToString();
var appBoundEncKey = Convert.FromBase64String(appBoundEncKeyB64).Skip(4).ToArray();
var appBoundDecodedKey = ProtectedData.Unprotect(appBoundEncKey, null, DataProtectionScope.LocalMachine);

I get the next error:

System.Security.Cryptography.CryptographicException: 'Key not valid for use in specified state.'

NOTE: I run in from Visual Studio in Admin Mode.

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