@TeamYouTube when I try to change my cover art it’s giving me this error since yesterday I signed out and inpic.twitter.com/vAexKK7dNP
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Yikes! Just to confirm, have you tried using a different device/browser? Also, try clearing your browser’s cache & cookies. Here's how: https://goo.gl/HZi6cx . Let us know if this makes a difference.