The current iteration wasn't working, so I used this manually and confirmed it did work in my client console. The experiments then showed up for me.
As I understand it the plugin is already using an older version of this code. Should be super easy to patch in the changes.
Fix sourced at: https://gist.github.com/MeguminSama/2cae24c9e4c335c661fa94e72235d4c4#file-discord-experiments-js, thanks to Zyrenth.
The current iteration wasn't working, so I used this manually and confirmed it did work in my client console. The experiments then showed up for me. As I understand it the plugin is already using an older version of this code. Should be super easy to patch in the changes.