buildx failed with: ERROR: failed to solve: failed to push ghcr.io/ubuntu18_cmake:main: unexpected status from HEAD request to https://ghcr.io/v2/ubuntu18_cmake/blobs/sha256:6775812af2199e32de47f5ce6868af7341a2f4aabc676f4afeaa9c948e3af22a: 400 Bad Request