Cascade to Niagara system nonfunctional (4-27), UE5

Trying out a recent build of UE5, a few days after preview came out. The cascade to niagara plugin seems entirely nonfunctional. I click on a cascade system, check convert to niagara, it waits a few seconds, and nothing happens. No new asset, no difference in the old asset. Any idea what I should do?

I would be tempted to do it yourself. Even when it functions, it needs a lot of manual tweaks afterwards…

I would be if I knew how. I am no Niagara expert and am simply trying to get a cheap effect- using the Soul:City rain storm effect with some minor adaptations. If I had any clue how to do it, I absolutely would.

You could setup 4.27 just to use the plugin, and then migrate to 5.