I had the same issue when i first started. See the comments on this thread for help. Welcome to Steemit
https://steemit.com/steem/@steemnews24/cant-add-my-steemit-profile-picture#@whitesj40/re-whitesj40-re-queeneleanor-re-whitesj40-re-steemnews24-cant-add-my-steemit-profile-picture-20170621t001918549z