Enabling Playwright / Browser Steps - getting "502 bad gateway"

[Entheologian]

I am trying to try test this feature, but when I add it to my docker-compose.yml and try to load the page I get the 502 gateway error.

Based on this info, I used the steps in the link below:

After Browser Steps have been run, then visit the Visual Selector tab to refine the content you're interested in. Requires Playwright to be enabled.

Using this in my docker-compose.yml file:
https://github.com/dgtlmoon/changedetection.io/wiki/Playwright-content-fetcher

The console isn't showing any errors when I start it up and no errors when I try to connect.

Any hints on what else I can try to know what the cause might be?