HTTP 500 Error in NodeJS | Cannot read properties of undefined (reading 'toUpperCase') | Errsole

In this tutorial video, we will troubleshoot a 500 Internal Server Error in NodeJS using Errsole. The error message states, "Cannot read properties of undefined (reading 'toUpperCase')". Watch as we reproduce the error in a sandbox environment, debug the server code, and resolve the error.

Errsole is a comprehensive error-tracking and debugging tool for server apps. It empowers developers to uncover the root cause of errors in their app, reproduce any error with a click, and debug the server code without any impact on the live app.

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