Users attempting to run a Flex instance may see the following error

Can't resolve '@babel/runtime/helpers/esm/assertThisInitialized'

Please follow the following steps to resolve this issue:

1. Run npm install --save react-redux.
2. Make sure that the react-redux version is 5.1.0.
3. Go to the modules folder on the flex-ui-sample.
4. Navigate to react-redux.
5. Copy over the content of the folder /src​ into the /es​ folder (make sure you are overwriting the files).

Additional Resources

• Getting Started with Twilio Flex
• Twilio Flex (Twilio Docs)
• Contacting Twilio Support for Flex Questions and Concerns