# Unity Ads SDK error codes reference

> Review the error code table for a quick reference for error codes and their causes.

The following table provides a quick reference for error codes and their causes. For details on identifying and resolving these issues, refer to the [SDK initialization](/ads-android/4.19.0/sdk-integration/troubleshoot/initialization-errors.md.md), [SDK load errors](/ads-android/4.19.0/sdk-integration/troubleshoot/load-errors.md.md), or [SDK show errors](/ads-android/4.19.0/sdk-integration/troubleshoot/show-errors.md.md) troubleshooting guides.

| **Category**   | **Code** | **Description**           |
| -------------- | -------- | ------------------------- |
| **Load, Show** | 2        | Timeout                   |
| **Init**       | 52000    | Unknown error             |
|                | 52001    | Invalid Game ID           |
|                | 52002    | Game ID mismatch          |
|                | 52003    | Internal protocol error   |
|                | 52004    | System error              |
|                | 52005    | Network error             |
|                | 52006    | Insufficient storage      |
| **Load**       | 52100    | No fill                   |
|                | 52101    | SDK not initialized       |
|                | 52102    | Placement not found       |
|                | 52103    | Internal protocol error   |
|                | 52104    | Placement/format mismatch |
|                | 52105    | Network error             |
|                | 52106    | Insufficient storage      |
|                | 52107    | Internal parsing error    |
| **Show**       | 52200    | Ad expired                |
|                | 52201    | Already showing           |
|                | 52202    | Internal error            |