treyb since the OP has not shared any log so far, it's impossible to tell if your issue is the same or completely unrelated. If you need help with this, it would be best to start a separate discussion.
In your case I'd guess you had just enough memory limit to compile the javascript of all your extensions, and either by adding more extensions or the extension updates adding more javascript, you went over the limit. For forums with a very large number of extensions (or a few extensions with a lot of javascript), it might be better to use the assets cache extension and use that to compile the javascript in a scheduled task. That way the memory limit for the main HTTP request handler doesn't have to be set too high.
