fresh terragrunt plan failing

[motatoes]

Tested here: diggerhq/terragrunt-huge-example#14

it seems that when the terragrunt module plan is first time and no state is stored digger fails with an error as such:

Terraform will perform the following actions:

  # null_resource.test will be created
  + resource "null_resource" "test" {
      + id = (known after apply)
    }

Plan: 1 to add, 0 to change, 0 to destroy.
time=2025-06-04T00:49:46.646Z level=INFO msg="Running Terragrunt command" command.binary=terragrunt command.args="[show -no-color -json /home/runner/work/terragrunt-huge-example/terragrunt-huge-example/core/diggerhq-terragrunt-huge-example-14-core.tfplan]" command.workingDir=/home/runner/work/terragrunt-huge-example/terragrunt-huge-example/core
time=2025-06-04T00:49:47.073Z level=INFO msg="Running step" action=run
time=2025-06-04T00:49:47.073Z level=INFO msg="Running command" command="echo \"Terragrunt generation!\"" project=diggerhq/terragrunt-huge-example#core
Terragrunt generation!
time=2025-06-04T00:49:47.269Z level=INFO msg="No plan policies found, succeeding"
time=2025-06-04T00:49:47.937Z level=ERROR msg="Error reporting project Run" error="unexpected status when reporting a project run: 500"
time=2025-06-04T00:49:52.564Z level=INFO msg="updating comment with job results" prNumber=14 commentId=2937903468 jobCount=6 jobType=plan
time=2025-06-04T00:49:53.004Z level=INFO msg="successfully updated summary comment" prNumber=14 commentId=2937903468
time=2025-06-04T00:49:54.149Z level=ERROR msg="Digger finished successfully"