Microsoft Word Template - fill a document error: Invalid docx file

Hi everyone,

I Am new to Make and would like to perform the following automation:
When I add a new task in clickUp I want to use information from the task to fill a word document that I download from nextcloud.
The trigger from clickup works fine, the Nextcloud connection also, but I fear I have an issue with the way I download the file from nextcloud so that the “Fill out document” feature always returns “Invalid docx file”.

Here’s the scenario and the relevant input. Am I correct, that the Data is invalid? How can I resolve this?