ERROR: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
    at Object.writeFileSync (node:fs:2435:5)
    at run (C:\Bordales Projects\giftwrap - Copy\test_service.js:9:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)