'allure' is not recognized as an internal or external command,

This error message usually occurs when the 'allure' command is not recognized by the command prompt or terminal. It may indicate that the Allure command-line interface (CLI) is not installed or not added to the system PATH environment variable.

To resolve this issue, you can try the following steps:

1. Install Allure CLI by running the following command in the command prompt or terminal:

   npm install -g allure-commandline

2. Add the Allure CLI path to the system PATH environment variable. You can do this by following these steps:

- Open the Start menu and search for "Environment Variables".
- Click on "Edit the system environment variables".
- Click on the "Environment Variables" button.
- Under "System Variables", scroll down and find the "Path" variable, then click "Edit".
- Click "New" and add the path to the allure command-line interface (e.g. "C:\Users\{username}\AppData\Roaming\npm").
- Click "OK" to save the changes.

After completing these steps, try running the 'allure' command again in the command prompt or terminal. It should be recognized now.