Most likely driver issue. Try a different PC (Windows 7 works best). Also, ensure the device battery is at least 50% charged.
Once you've downloaded the Firehose Loader, follow these steps: Nokia 1.4 Firehose Loader Download- - Google
The Nokia 1.4 Firehose loader is not an official tool released to the public by HMD Global (Nokia’s manufacturer). Instead, these files are or extracted from authorized service centers. Consequently, searching for "Nokia 1.4 Firehose Loader Download" on Google is fraught with risks: Most likely driver issue