Can you please check if the image you're trying to upload is in .jpg, .jpeg, .gif, .png format and at least 250px by 250px? Also, make sure that it's a clear photo of yourself, not a long shot and your face is clearly visible. If it meets those requirements and you still can't upload it then please try clearing your cache and cookies and using a different browser to check if the problem persists.
Could you please follow back with us here if you still need assistance? We can assist you accordingly or have the correct support team to assist you.