@TeamYouTube what wrong with the profile pictures?neither doesn't exist or it's a blank profile picture,what's happening? 

pic.twitter.com/mQDjYITfPu
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Hmm, if you haven't already, please uninstall the app updates > restart the device > update the app. Also, if you're having the issue on a desktop, try clearing the browser's cache & cookies. Here's how: https://goo.gl/e2dYZt . Let us know if this makes a difference.
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