[BUG] Version 2.6.2 built with react-script build results in a runtime error

Description

After upgrading to @microsoft/applicationinsights-web@2.6.2 (from 2.6.1) in a react project, the built solution (via react-scripts) produces a runtime error, resulting in a blank screen.

The following error is present in the console:

ReactPlugin.ts:103 Uncaught ReferenceError: __extends is not defined
    at ReactPlugin.ts:103
    at Object.<anonymous> (ReactPlugin.ts:17)
    at f ((index):1)
    at Object.53 (main.5d60f9e0.chunk.js:1)
    at f ((index):1)
    at Object.28 (main.5d60f9e0.chunk.js:1)
    at f ((index):1)
    at Module.345 (main.5d60f9e0.chunk.js:1)
    at f ((index):1)
    at r ((index):1)

Steps to Reproduce

1. Setup a create-react-app project with @microsoft/applicationinsights-web@2.6.2 & @microsoft/applicationinsights-react-js@3.1.0
2. Build the project
3. Serve the build folder
4. When accessing the webpage, the screen is blank with the error above in the console.

• OS/Browser: Windows 10, Chrome
• SDK Versions:
  • @microsoft/applicationinsights-web@2.6.2
  • @microsoft/applicationinsights-react-js@3.1.0
  • react-scripts@4.0.3

Additional info

This issue only occurs when built. Starting a development server works fine.

[MSNev]

React v3.1.1 and ReactNative v2.3.1 are now published to NPM

[github-actions[bot]]

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