Thread:Extension talk:CategoryTree/CategoryTree broken after updating to 1.21.1 and installing new CategoryTree Snapshot

I had a mediawiki with version 1.20.3 and just updated to 1.21.1. The update was successful and I was able to restore my database and other extensions. However CategoryTree was not working after installing new mediawiki version 1.21.1. The Category list populates, but you cannot drill down through the category lists. The category arrows/+ do not display AT ALL, it is just a straight list of categories I could not even try to expand them because there is no option available to do so. SO I downloaded the new snapshot of category tree for version 1.21. Installed the extension. Confirmed LocalSettings are configured for CategoryTree as such: I have even tried following previous guides and modifying my CategoryTreeFunctions.php (ref: ) from to and tried changing CategoryTree.php (ref:) from to but making those above changes to CategoryTree.php/CategoryTreeFunction.php causes the whole site to goto a Error 500 page, so I have undone the above two changes, but I am still back to the point where I cannot drill down thru the category tree it only shows the top level categories now. I have even tried running update.php again but still does not resolve the issue. I have tried to find other threads regarding this, but I could not find any. Any help will be greatly appreciated, thanks...