To confirm, have you tried the steps listed here to change the channel banner: https://goo.gl/JMKL7p ? Keep us posted.
yeah i tried everything and it didnt work. im wondering if you arent allowed to make screenshots your banner tho because when i set my banner to a normal picture i took, it updated. but when i try to make my banner a screenshotted picture, the error message pops up.
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Hmm, have you tried uploading using a different browser to see if that helps? Also, we recommend checking our image size & file guidelines in the Help Center article shared above.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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