If you haven't already, you can update from here: https://aboutme.google.com . You can also try to clear your cache & cookies and try it on a different browser to isolate the issue. More steps about changing your channel info here: https://yt.be/help/znjF . Hope this helps!
@TeamYouTube It has been 3 months since youtube let me change my name but I tried before but it won't let me change it would you's be able to change it back or not
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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