I figured it out. I only had like... 1000 sats inbound liquidity available for the channel I had opened.
The first channel I had opened had lots of liquidty (100000+ sats inbound) but apparently no route. Then the new 'Zeus' channel I opened had a route but no liquidity. So it needed like 5000 sats liquidty... even to redeem small amounts from the 'zaplocker'.