I’m experiencing the same issue on my site. For example, when I log out, the page turns completely white with the same error. Some users also reported that they can’t log in because the page is just blank. It seems to happen randomly.
The main problem is that there’s no clear error message to indicate what’s causing it. I tried to track it down by checking my theme components. I’ve already updated most of them to gjs, but here’s the interesting part: when I deactivate and then reactivate a specific component, the site starts working again without errors. I still don’t know what’s causing this issue though… It seems that the problem only occurs on pages where a (custom) theme component is present. So at least this gives me a clue that the issue must be coming from one of the components.