Thanks for trying to help @gparascandolo.
It looks like this is impossible to solve in Auth0. The link provided above references a GitHub repo that states to add “file:///” to the Allowed Callback URLs in the Auth0 dashboard for an Electron app, but it does not work from what I can see as of 2023-10-24.
Disappointing that Auth0 does not have a workaround for this. Oh well.