Plugin "Duplicate export" error after Discourse update

[Lilly (Lillian)]

looks like it may be related to this?

Introducing a new build system for plugins

Over the last few months, we’ve been working on a new build system for plugin JavaScript code. This will bring plugins up-to-date with the changes we made to the theme build system back in July 2025, which lean on more modern browser technologies and JS build tooling. This change is largely backwards-compatible. Most plugin authors won’t need to do anything. Benefits As well as the behind-the-scenes modernization, this change will bring a number of functional benefits to Discourse devel…