ECE bootstrap times out waiting for runner container node


I'm trying to install ECE 3.7.1 on a Rocky 9.3 machine with Podman 4.6.1. The initial checks all pass, but when it reaches "Waiting for runner container node {}" it stops. After 10mins it errors out with "Future timed out after [600000 milliseconds]" and a scala stacktrace.

Anything I can try to get more information about what is failing?