Can't install Rhasspy Junior on HomeAssistant OS / Pi3B+

Hi All,

I’m excited to try Rhasspy voice commands on Home Assistant, but when I try to install the Rhasspy Junior add on, I get the following message “This add-on is not compatible with the processor of your device or the operating system you have installed on your device.”

I’m running Home Assistant OS, Home Assistant 2022.12.6, Supervisor 2022.11.2, Operating System 9.3, Frontend 20221213.0 - latest.
Hardware is a Pi3B+,
uname says: Linux 5.15.61-v7 armv7l

This seems strange, the documentation does not mention any restrictions?
Any ideas?