Web apps not working on Mac at all

I have the latest version of Chrome installed. I want to run a few sites/web apps as separate windows, like Gmail. I do the whole Menu / Cast, Save and Share / Install... then select that app from Chrome://apps, and... nothing. No window pops up. No tab pops up. Nothing. And no icons or anything pop up in my Applications folder (not sure if they're supposed to or not).

I've reset all flags to standard in case something in there had gotten changed, but still nothing. Websites and tabs work fine in the standard Chrome browser window otherwise.

Any thoughts or suggestions? Running macOS 26.5.1 on an M4 Max Studio.