terrform-validator json char error

tf_validator.log

Run /tmp/terraform-validator validate /tmp/plan.out.json --policy-path="/tmp/policy-library" --verbose
  /tmp/terraform-validator validate /tmp/plan.out.json --policy-path="/tmp/policy-library" --verbose
  shell: /usr/bin/bash -e {0}
  env:
    GOOGLE_CREDENTIALS: ***
    GOOGLE_APPLICATION_CREDENTIALS: /tmp/google.json
    CLOUDSDK_METRICS_ENVIRONMENT: github-actions-setup-gcloud
    TERRAFORM_CLI_PATH: /home/runner/work/_temp/1758e47d-fc34-4904-bce3-49e563d78065
2021/06/17 15:56:20 [INFO] Authenticating using DefaultClient...
2021/06/17 15:56:20 [INFO]   -- Scopes: [https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/cloud-identity https://www.googleapis.com/auth/ndev.clouddns.readwrite https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email]
Error: converting tfplan to CAI assets: reading resource changes: reading JSON plan: invalid character 'c' looking for beginning of value
Usage:
  terraform-validator validate <tfplan> [flags]

Flags:
      --ancestry string      Override the ancestry location of the project when validating resources
  -h, --help                 help for validate
      --offline              Do not make network requests
      --output-json          Print violations as JSON
      --policy-path string   Path to directory containing validation policies
      --project string       Provider project override (override the default project configuration assigned to the google terraform provider when validating resources)

Global Flags:
      --verbose   Log output to stderr