What is the meaning of the error message "NodeJS Buffer is not defined"?

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The error message "NodeJS Buffer is not defined" means that the Buffer object, which is a built-in Node.js module for working with binary data, is not available or has not been properly imported or initialized in the current script or application. This can happen if the Node.js version being used is outdated or if the code is being executed outside of a Node.js environment.