Weird "run" error with workers + CF workflows

{
  "$cloudflare": {
    "diagnosticsChannelEvents": [],
    "truncated": false,
    "event": {
      "rpcMethod": "run"
    },
    "scriptName": "telegram-mod",
    "outcome": "exception",
    "eventType": "rpc",
    "entrypoint": "MessageHandler",
    "scriptVersion": {
      "id": "76e2dd15-d113-430e-a2ee-529dfd2bc771"
    },
    "executionModel": "stateless",
    "$metadata": {
      "requestId": "FU02JX2871X677HA",
      "id": "01JHED5VRMEET8V1MG0EXQH96G",
      "type": "cf-worker-event",
      "error": "run"
    }
  },
  "level": "error",
  "message": "run"
}