Hello,
This issue is troubling me as well, just as the opening poster TBTC I have tried different amounts, also much smaller than my total balance and the total size of my channels. Please see the attached screenshot.
Perhaps there is something I don’t understand about the relative size of the total balance on the node, compared to the channels. If that’s the issue, then I can suggest some UX improvements to the error message.
Kind regards
Orange Sparrow