Error: Process completed with exit code 255.

An error occurred (InvalidParameterException) when calling the PutImage operation: Invalid parameter at 'ImageManifest' failed to satisfy constraint: 'Invalid JSON syntax'

• GitHub Actions, act, .github/workflows/, ~/actions-runner/, svc.sh, deploy:, run:, runs-on:, uses:, steps:, jobs:, on:, env:, uses:, script:, continue-on-error:, template:, aws-actions, inputs:, GITHUB_ENV, needs:, github., GitHub runner, my-docker-publish.yml, GitHub Actions variables, GitHub Actions contexts, GitHub Actions Importer, If:, SLSA, Actions Runner Controller (ARC), $GITHUB OUTPUT, notify:, Marketplace, GITHUB_TOKEN