create_attachment in wiki_client unable to upload png files

I am trying to create a png file as attachment in azure wiki as code and getting the following issue:

azure.devops.exceptions.AzureDevOpsServiceError: The wiki attachment creation failed with message : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

This is the snippet

version_descriptor = GitVersionDescriptor(version="main",version_type="branch")
with open("./sample-image.png","rb") as png_file:
    wiki_client.create_attachment(upload_stream=png_file, version_descriptor=version_descriptor, project="<project-name>", wiki_identifier="<wiki-name>",  name="sample-image.png")

Comece em wiki_client.create_attachment e reproduza a falha com o snippet fornecido de upload de PNG binário. Rastreie como upload_stream é tratado antes da solicitação ao Azure Wiki; considera-se concluído quando o anexo PNG é criado com sucesso sem o erro de Base-64.