Another Case of Not Being Able to Install Add-Ons

Looks like I'm not the only one dealing with this, but none of the existing posts I found actually show a resolve!

I'm trying to install the Snap SVG Add-On for Animate CC 2017. ( https://creative.adobe.com/addons/patches/26811#.WMjGsBIrISQ  )

Acquired and installed, but my CC Activity Stream is not receiving notifications.

Here's what I've already tried:

1) Checked to make sure I was logged in, and sync settings are enabled.

2) Uninstalled, restarted, reinstalled.

3) Tried downloading the .zxp file to install using Extension Manager (even though it's supposed to be obsolete). This resulted with two outcomes:
          - "Cannot find required data from database"
          - "Failed to install com.example.SnapPlatform. Please make sure the manifest.xml of this extension is valid... blah blah blah"

          - You can see the actual errors here: Cannot Install · Issue #98 · cjgammon/SnapSVG-Animator · GitHub      ...(Note that I closed the issue because it seems it's not the Add-On that's faulty... see #5 below)

4) Attempted this: Add-ons not showing up in CC Activity stream after installing , but could not generate a log because 'ExManLog.YES' resulted in an error: "does not exist"

5) Also tried to install a "Featured" Add-On for Photoshop just to make sure it wasn't the Snap SVG Add-On that was faulty.