ChatGPT not loading in Chrome

Starting a few days ago, at the same time the “Create” button disappeared from my custom GPT → Edit pane (known issue), ChatGPT is no longer loading in Chrome (normal view). The left-hand panel is completely blank, as well as “most” of the context window.

It works in Incognito mode, but not the “normal mode”.

I’ve tried all of the troubleshooting tips and filed a ticket, but no one has been able to figure out what’s going on. Please help.