# TypeError: The JSON provider is not installed. Run 'pip install flask[json]'.

- **ID:** `python/flask-json-provider-error`
- **Domain:** python
- **Category:** install_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Flask was installed without the JSON extra dependencies, such as itsdangerous or simplejson.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (100% success)
   ```
   Run pip install 'flask[json]' to install all JSON dependencies.
   ```
2. **** (90% success)
   ```
   Manually install missing packages: pip install itsdangerous simplejson
   ```

## Dead Ends

- **** — Both are required for Flask's JSON provider. (60% fail)
- **** — It still lacks the required dependencies. (90% fail)