Problem in save document function of Mifiel

[atifaziz2]

I am using mifiel document.save function and if I put hosted or server pdf path to file:'path to my-file.pdf' it throws the error. If I put the local path while testing, it works fine. I am implementing in firebase sdk for cloud functions in node.js. Below the function from documentation for reference.

const document = new Mifiel.Models.Document({
file: 'path/to/my-file.pdf',
signatories: [
{ name: 'Signer 1', email: 'signer1@email.com', tax_id: 'AAA010101AAA' },
{ name: 'Signer 2', email: 'signer2@email.com', tax_id: 'AAA010102AAA' }
]
})
document.save().then(doc => {
console.log(doc)
doc.original_hash
doc.file
doc.file_signed
})