RUM does not find updates (both with local AUSST and without)

I have deployed a Creative Cloud Packager-Package to about a dozen Macs (OSX 10.11.5) last year. Until some time in this year, I successfully used RemoteUpdateManager (RUM) version 1.9.2 on the Macs along with an Adobe Update Server in-house (AUSST) to install updates to the Macs.

Recently I discovered that my version of the Adobe Update Server Setup Tool (3.0.0.59) does not download the newest updates for Photoshop and Illustrator. So I grabbed the new Creative Packager (CCPLauncher) and installed it. This have me access to the newest version of the Adobe Update Server Setup Tool (4.0.0.42) which I copied to my AUSST root folder. It downloaded 39 GB of new updates in the folder "ACC" in my AUSST root folder.

The next thing I noticed was that I needed to update RUM on the clients and the Overrides file as well. I created the client config (Overrides) and put it on the Macs. Then I grabbed the newest version (1.9.6) from the newly updated Creative Cloud Packager. Trying to use this version resulted in the following error:

08/31/16 09:54:36:035 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 82124 | Initializing UpdaterCore Library... 08/31/16 09:54:36:633 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 82124 | UpdaterCore library initialized successfully. 08/31/16 09:54:36:656 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 82124 | The FFC override url derived from redirection file is ...(http://192.168.1.50/ACC/services/ffc/products/ffc.xml) 08/31/16 09:54:36:701 | [ERROR] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 82124 | Failed to initialize HDPIM wrapper, could not find required function handles ... 08/31/16 09:54:36:701 | [ERROR] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 82124 | Failed to initialize the HDPIM module.

Updating the Creative Cloud app by hand (Is there a pkg for deploying the Creative Cloud app, or another way of updating it?) solved the problem, but then no updates are found by RUM. Here is the output:

08/31/16 11:12:27:645 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | Initializing UpdaterCore Library... 08/31/16 11:12:28:498 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | UpdaterCore library initialized successfully. 08/31/16 11:12:28:499 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | FFC override file does not exist ... (/Library/Application Support/Adobe/AAMUpdater/1.0/AdobeUpdater.Overrides) 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  | HDPIM | 104419 | Inside hdpimCreateSession 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  | HDPIM | 104419 | Entering into 'createHDPIMSession' 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  | HDPIM | 104419 | new session 'C799C848-9E78-442E-94FD-21DF03863E43' created 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  | HDPIM | 104419 | Exiting hdpimCreateSession, new session ID is 'C799C848-9E78-442E-94FD-21DF03863E43' 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | ************************************************** 08/31/16 11:12:28:529 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | Starting UpdaterCore CheckForUpdate... 08/31/16 11:12:28:851 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | CheckForUpdates completed successfully. 08/31/16 11:12:28:851 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | ************************************************** 08/31/16 11:12:28:851 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | Starting UpdaterCore DownloadUpdates... 08/31/16 11:12:28:886 | [INFO] |  | AAMEE | HUM | HUMSessionManager |  | HUM | 104419 | Entering into 'createHUMSession' 08/31/16 11:12:28:887 | [INFO] |  | AAMEE | HUM | HUMSessionManager |  | HUM | 104419 | new session 'A9899030-9825-4013-9377-F68C50A413A2' created 08/31/16 11:12:28:887 | [INFO] |  | AAMEE | HUM | HUMInterface |  | HUM | 104419 | Exiting humCreateSession, new session ID is 'A9899030-9825-4013-9377-F68C50A413A2' 08/31/16 11:12:30:946 | [INFO] |  | AAMEE | HUM | HUMInterface |  | HUM | 104419 | Exiting humDownloadProductFFC with status '1' 08/31/16 11:12:31:070 | [INFO] |  | AAMEE | HUM | HUMInterface |  | HUM | 104419 | Exiting humParseProductFFC with status '1' 08/31/16 11:12:31:106 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | HD products not installed on the system ... 08/31/16 11:12:31:107 | [INFO] |  | AAMEE | HUM | HUMInterface |  | HUM | 104419 | Exiting humGetLatestUpdates with status '1' 08/31/16 11:12:31:107 | [INFO] |  | AAMEE | HUM | HUMInterface |  |  | 104419 | No HD product applicable update found  ... 08/31/16 11:12:31:109 | [WARN] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | Failed to enumerate folder (/Users/admin/Library/Application Support/Adobe/RemoteUpdateManager_Downloads) while cleaning up downloaded HD updates ... 08/31/16 11:12:31:109 | [WARN] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | Failed to cleanup some obselete update media downloaded at (/Users/admin/Library/Application Support/Adobe/RemoteUpdateManager_Downloads) 08/31/16 11:12:31:137 | [INFO] |  | AAMEE | HUM | HUMInterface |  | HUM | 104419 | Exiting humTerminateSession with status '1' 08/31/16 11:12:31:137 | [INFO] |  | AAMEE | Utilities | RemoteUpdateManager |  |  | 104419 | No new applicable Updates. Seems like all products are up-to-date

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As you can see, this error also occurs without the overrides, meaning without my in-house AUSST. What am I doing wrong?