> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/~/revisions/NShYVVc01DvYc5bgBiwq/developer-guides/error-messages/0001-to-0015/aur0014.md).

# AUR0014

### **Error message**

key/value cannot be null or undefined. Are you trying to inject/register something that doesn't exist with DI?

### Error explanation

A key was `null`/`undefined` in a `container.get`/`.getAll` call

### Possible solutions

Make sure the key is not `null`/`undefined`. This sometimes can happen with bundler that leaves circular dependency handling to applications, e.x: Webpack.

Please also note that this error could be caused by a plugin and not your application. After ruling out that the error is not being caused by your code, try removing any registered plugins one at a time to see if the error resolves itself.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aurelia.io/~/revisions/NShYVVc01DvYc5bgBiwq/developer-guides/error-messages/0001-to-0015/aur0014.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.