My avatar disappeared. Tried to put it back, same image, but no go. Now what?

What steps are you doing to load it?

I haven't read through this but see if it helps.

https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/17878282/how-do-i-change-my-avatar

I’ve been at it for a couple days trying to resize it and fit. Gave up on it. Never took the photo I was trying to upload it.

Beats the hell out of me. Have tries flicks that work everywhere else but here. Why the one disappeared is beyond me, and was here for years........