> ## Documentation Index
> Fetch the complete documentation index at: https://docs-unity.molca.id/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting — Digital Twin SDK

> Scope, networking, JSON mapping, and POI behavior in _MolcaDT.

Back to [Troubleshooting hub](/overview/troubleshooting).

## Product scope

* **Symptom:** VR type references in DT implementation (compile errors or wrong runtime)\
  **Check:** DT code lives under `_MolcaDT`; use DT managers/handlers/network, not VR scenario/session types.\
  **Refs:** [Platforms](/overview/platforms), [DT overview](/dt/overview), [DT project layout](/dt/project-layout)

## HTTP / token / mapping

* **Symptom:** HTTP 401 loop or mapping empty in panels\
  **Check:** `TokenRenewalManager` keyword lists; flat dictionary keys must match `FieldMapping.displayName` in `JsonMappingAsset`.\
  **Refs:** [DT network and mapping](/dt/network-and-mapping)

## POI layout

* **Symptom:** POI cards missing or overlapping\
  **Check:** `CameraController.instance`, `poiHandlerParent`; stacking and offscreen mode on `POIManager`.\
  **Refs:** [DT POI and panels](/dt/poi-and-panels)

## Related

* [Troubleshooting hub](/overview/troubleshooting)
* [DT startup flow](/dt/startup-flow)