Excel writer to Sharepoint

Hi! I made a workflow to automate file upload and transformation. For context the workflow goes like list files → excel reader → transformations → excel writer.

Now, I want to automatically upload the excel file to Sharepoint using KNIME where I used the workflow as seen in the picture so that whenever I modify the transformations in KNIME it will reflect in Sharepoint.

However, it is not uploading anything to the sharepoint altho the link and working directory is accurate. Anyone knows how I can solve this?

Thanks!