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

i'm having this same issue. upgrading from 1.19 to 1.23. upgraded mediawiki and database as well as moving from php 5.3 to php 5.6. pulled latest 1.23 code from here.

afinderp were you ever able to resolve this issue? it's pretty sad that no one ever responded to your post.