If you own the two nodes, the keysend is key to maintain some kind of balance in the channel and avoid this problems.

nikotsla

lightning

CLN Node can not send Sats out.

Wumbo

That was the issue, Thank you.

For anyone in the future that might read this:

In the Core Lighting web UI, goto channel details there is a "Spendable" amount.  Make sure this reads as greater than zero.  Which is different from "Maximum Send" amount which shows your whole channel size balance.  ( not reflecting the reserve amount)