Unable to attach .docx file

Not sure if this functionality is already active but shows a + symbol in the chat box, I tried uploading a .docx file via various browsers (firefox, chrome, opera) it doesn’t upload the .docx - shows no error either. I forgot a loom will take it next time I try it again.

PS - OS is windows. I was unable to convert doc to pdf (some characters like umlaut were breaking)

Already see a pdf bug which seems solved - keeping .docx separate for now.