Hey @TeamYouTube Why do I get this error message when I try to upload a custom thumbnail?pic.twitter.com/q4BSMIOA2Q
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Did not fix the issue. I guess Dropbox and my Tablet will be my friend for a while as a workaround.
Thanks for letting us know. In the meanwhile, could you let us know if the issue also persists when you're using Incognito mode or a different browser? That'll help us.
Just tried it using Incognito mode. Same error
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