i m struggling solving this issue since a while. I even hired someone without any success.
I want to remotely publish a post+its feature image. Posting is working fine, but transfering the image is failing.
error is

Blockquote

Unexpected HTTP status code: 403 – Response:
Forbidden
You don’t have permission to access this resource.

“

BUT, and here is the issue i have : I use a third-party (competitor) and he is can, with exactly the same credentials, to publish the post AND to transfer the feature image.
it works also fine with Postman
So, my assomption is that the authorization is not the issue.
I did change the CHMOD as specified in all tutorials i have found

Would some nice people help me ?
thanks
david