The message port closed before a response was received. and also
handling response: TypeError: Cannot read property 'loggedOut' of undefined in both a plugin I’m working on and now in this:
I guess it’s related to Upcoming core changes that may break some themes/components (April 12), but it’s not immediately clear just how.
EDIT: Well, I fixed the problems in my theme component (it works again and isn’t throwing errors), but I’m still seeing the above errors.