From raw text to readable text fed into OpenAI module

Hello. I am new at Make and this community.
I am creating my first significant automation. I need to watch a Google Drive folder, get a pdf file once uploaded, convert it into text file, extract into Json format some information if present and finally copy these array into a new row of a google sheet file.
I used:
Google Drive (Watch files in a folder)
Google Drive (download a file)
CloudConvert (convert a file to txt)
HTTP (Get a file); here I set “Temporary URL” as source from ColoudConvert
OpenAI (transform text to structured data)

I get an error at OpenAI module: “Buffer can’t be converted to text for parameter ‘rawText’.”
HTPP module results raw data but OpenAI need text as input. How can I convert raw data into text? maybe there is a more efficient wat to get such result.
Thanks :slight_smile:

In the meantime I replaced CloudConvert with Google Cloud Vision and flow is working. I have to change the OpenAI prompt as not enough strong.