Getting error code 400 on both Vision and PDF base64 input - Response API

_j:

… that base64 isn’t a corrupted format and can be decoded

In a previous post, I said:

I captured the request into a text file (API-Request.txt) right up to the “responses” endpoint

Well, I cut out the base64 from the response and decoded it and here it is:

So, it looks like that is not the problem.