That’s a handy tip! Sadly I can’t tell my docker to go and get the beta version, even if the Plex Server itself knows that there’s a new version available…
I have the same issue (std::bad_cast) with 1.23.2.4656. Very annoying. I find it weird that I can view the same photos with a different user, and it works as expected. However, viewing as the Plex administrator causes the exception to be thrown.