[bug] E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 Release' is not signed.

[Usefff]

Good day. Today's Sagemaker PyTorch trainings was crushed with next errors:

W: GPG error: https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  Release: Couldn't create temporary file /tmp/apt.conf.048i9y for passing config to apt-key
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  Release' is not signed.
W: GPG error: https://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1804/x86_64  Release: Couldn't create temporary file /tmp/apt.conf.L1nceC for passing config to apt-key
E: The repository 'https://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1804/x86_64  Release' is not signed.
W: GPG error: http://security.ubuntu.com/ubuntu bionic-security InRelease: Couldn't create temporary file /tmp/apt.conf.qoYNPM for passing config to apt-key
E: The repository 'http://security.ubuntu.com/ubuntu bionic-security InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic InRelease: Couldn't create temporary file /tmp/apt.conf.gpCoTN for passing config to apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-updates InRelease: Couldn't create temporary file /tmp/apt.conf.MwjqU0 for passing config to apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' is not signed.

I used this training scripts last 3 months, and more than hundred trainings was ok. I nothing changed, but today stuck with this error.

I use DLC image/dockerfile: 763104351884.dkr.ecr.us-west-2.amazonaws.com/pytorch-training:1.8.0-gpu-py3 Is this any changes on your side?

Thanks