Blank Pop up when uploading (a changed) profile image for Jobs and Experts?

Hi Team - you fabulous people.

When a user goes to (to edit their profile in Jobs and Experts) this is what happens:

Change Avatar > Choose file and upload > Call back = Blank white popup

Even using the X to close has not response. It only does this when replacing a avatar.

Really hope you can help with this one....

Blessings

Zen