@TeamYouTube I have tried everything to upload a custom thumbnail, and every single time it says: “Failed JSON input” I have tried clearing browser cookies and history, turning off extensions, but nothing works.
But when I use another browser besides Chrome, It does!
That's strange. Could you check if there are any pending updates for your browser? If there are any, try updating it to the latest version available to see if that makes a difference. Let us know!
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Yes, it is on version 70.0.3538.110
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Noted. To help the right team better investigate, can you send a feedback report from the device and account having the issue? Steps here: https://goo.gl/WdI0BK . You may not receive an individual response but the details will help us identify and fix any issues, thanks.
End of conversation
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