sev-guest-get-report fails with firmware error 27

[DiWangShePi]

I'm having a bit of trouble trying to get a report.

$ sudo ./sev-guest-get-report guest_report.bin -x
Generating report using the following hash:
    0000000000000000000000000000000000000000000000000000000000000000
    0000000000000000000000000000000000000000000000000000000000000000

firmware error 27
get_extended_report: Directory not empty

I'm not quite sure what's going on, this is the first time I've tried using this tool. I looked at the system logs and confirmed that AMD SEV-SNP was enabled

$ sudo dmesg | grep -i SEV
[    1.566544] Memory Encryption Features active: AMD SEV SEV-ES SEV-SNP
[    2.129720] SEV: Using SNP CPUID table, 64 entries present.
[    2.565234] SEV: SNP guest platform device initialized.
[    8.790464] sev-guest sev-guest: Initialized SEV guest driver (using vmpck_id 0)

I would appreciate it if you could tell me what I did wrong or what steps I missed. The commands I execute are, in order:

git clone https://github.com/AMDESE/sev-guest.git
cd sev-guest
make sev-guest-get-report
make sev-guest-parse-report

Then I use this command and met the problem

sudo ./sev-guest-get-report guest_report.bin -x

[DiWangShePi]

The tutorial I refer to is https://docs.aws.amazon.com/zh_cn/AWSEC2/latest/UserGuide/sev-snp.html
The OS image I use is Amazon Linux 2023
The instance type I use is c6a.xlarge
The region I chose is ohio (us-east-2)

[tanaybaswa]

This is exactly the same issue I am facing right now! Did you manage to figure it out?