@youtube can you guys please fix your bug when uploading cover art. I followed everything correctly and still i get the same message
“image to small must be at least 2048 pixels wide..... 
Hmm, can you try refreshing, closing & reopening your browser? Can you also try clearing cache & cookies: https://yt.be/help/Cko1 ? If all else fails, we'd recommend sending a feedback report directly from YouTube: https://yt.be/help/feedback . Thanks.