Hactool Prodkeys Does Not Exist Fixed -

If your file is empty, contains HTML code (downloaded from a pastebin by mistake), or has spaces instead of equals signs, hactool will reject it.

For power users who run hactool from many locations, set the HACTOOL_KEYS_FILE environment variable. hactool prodkeys does not exist fixed

If you cannot dump your own keys (e.g., you are using a patched Switch or an emulator), there are limited alternatives. If your file is empty, contains HTML code