if len(form) == 0 {
		return nil
	}

	sessionPolicyStr := form.Get(stsPolicy)
	if len(sessionPolicyStr) == 0 {
		return nil
	}

	sessionPolicy, err := policy.ParseConfig(bytes.NewReader([]byte(sessionPolicyStr)))
	if err != nil {
		return err
	}

	// Version in policy must not be empty
	if sessionPolicy.Version == "" {