Installing the newest version of the Addon Manager won't fix the problem if you have an old version of Zurich. You need to install the most current version of Zurich, which will of course come with the correct Addon Manager so, there's no need to install anything else.
If you install something older after the last version of Zurich, it will create exactly what you are reporting so, if you are reporting it, it means you haven't installed the current version of Zurich, or you are trying to downgrade it by installing something else after it.
There are no other explanations for what you are describing.
If something wasn't loaded and wasn't running, you would just have "no buildings", and that's it. If you are getting the pauses, it means everything IS working (which you can confirm by check if you have BOTH the Addon Manager AND the Couatl menus under the "Addons" menu), but you are using old version of something.
Of course, since you said "the same issue", I'm assuming you are still observing the "same issue", which is no buildings AND pauses.
If something has changed, and you don't see the pauses anymore, but still no buildings, then it's not the same issue anymore, and it's an entirely different problem so, please clarify if you are still getting the pauses, or the pauses have gone, and you just don't have buildings.