Local customizations broke site on upgrade, how to disable?

I’m back in business!! Thank you so much @sam

And based things working now, and the /logs errors I saw and this post: https://meta.discourse.org/t/deprecating-objectcontroller/28385?u=jesselperry

I think it had something to do with me calling one of these in a site customization?

Discourse.User.currentProp('username')