What you want to be copying into the channel ID section is everything that I have put into bold below, but obviously changing it into your channel ID https://www.youtube.com/channel/UCGJyXVJuOKsmnHW6np2Tdwg
What you want to be copying into the channel ID section is everything that I have put into bold below, but obviously changing it into your channel ID https://www.youtube.com/channel/UCGJyXVJuOKsmnHW6np2Tdwg
maybe its having an issue with your custom URL. If you go the the "my channel" section in YouTube you old, none custom URL should show, maybe try posting that in perhaps?