I'm, getting console post error.

[remcostoeten]

I run the server like so
PS C:\Users\Remco\Downloads\vulture-master\vulture-master> python3 .\server.py
Serving HTTP on :: port 80 (http://[::]:80/) ...

which seems succesfull. Then i paste the js in the DOM and then I get an undefined. Then couple seconds later a post 400.
}
}
trackuser()

undefined
app.39064ec0dec361638b30.js:54 POST https://crashlogs.whatsapp.net/wa_fls_upload_check?type=crashlog&access_token=1063127757113399%7C745146ffa34413f9dbb5469f5370b7af 400