The instruction is straightforward:
How to Upload Your Profile Picture
To upload (or edit) your profile picture, click Photo on the left-hand side of your Profile page. Then choose an image from your computer to upload. Once it’s uploaded, you can crop it, if necessary, and then click Save.
But what can I do if the SAVE button is not active? No error message, no feedback of any kind about what is wrong. I checked the properties of my picture and it is 613x696 px therefore well within the required parameters. While I could select a different picture, I'd like this one to stay consistent with the pictures and videos in the course material. Please help. Thank you.