Thanks Julian,
I am using the Lucee4
docker image and was able to get this resolved thanks to the help of Joe Gooch and Geoff Bowers. I don't know how to explain it particularly well, but basically it turned out the cacerts in Lucee needed to be updated with the cacerts from the Java runtime on the host operating system, as the Lucee cacerts are a bit out of date (or something).
For future users of the Lucee Docker images, the good news is that it looks like Joe and Geoff are working together to get this patch into the base Lucee Docker images so future users (at least those using the Docker images) won't run into it.
Anyhow, thanks again Joe, Geoff and Julian!
Brian