Reveal-anonymous user plugin breaks due to Ember related error

I have been using the unofficial plugin for many years. I rebootstrap Discourse every 6 months and am now using v3.2.0.beta5-dev.

Today, the site is not loading due to what may be related to this plugin:

Uncaught (in promise) ReferenceError: Ember is not defined

The reveal anonymous feature is needed for our site (even though I understand you can go straight to the database).

Is there an official plugin that provides this needed functionality, or is there a way to maintain tfpk’s plugin?

I’d start opening an issue on that plugin repository to ask if the maintainer is keen on updating it still. If not, an option is opening a topic on marketplace and offering a bounty for someone to get it updated.