And the copy and paste previously mentioned, so 3 possibilities.
I somehow managed to eliminate my ability to add text here so it is appearing within the quote block....ignore that. I was however trying to add images using the attach file button, and I did so without any problems as you can see below. There must be a configuration issue that affects some PCs. I am running the most current version of Windows 11. My browser is MS Edge, also a current version.I went to my own Direct Messages page and saw the same thing - no "Attach Files" button, the image attachment button seems to require a web address, and I cannot copy/paste an image into the DM text pane.