buildx failed with: ERROR: failed to solve: failed to push ***.dkr.ecr.***.amazonaws.com/chainlink-env-tests:ci.38edb74c94822008a9fc699f3d7e93d7bfe48868: unexpected status from HEAD request to https://***.dkr.ecr.***.amazonaws.com/v2/chainlink-env-tests/blobs/sha256:795d347b173320b372d348a11452ba27a475a3538917ef9f27ad5355b02db457: 403 Forbidden

Your docker password is not masked. See https://github.com/aws-actions/amazon-ecr-login#docker-credentials for more information.