load file from the localpath does not work

[Lilleri]

the library has an option to load the media from the local file path, but when it send, it got refused from Whatsapp because it has not set the header Content-Length, there is no way to set custom header from outside, would be great to be set inside the function, every function are affected by that.

[viniciuslk]

I'm having this issue too. Is there a workaround?