The language "olo" was apparently added to the CX configuration in T147368, but when I actually try to publish an article, I get "docserver-http: HTTP 404".
It's not urgent at all, and it's also possible that the configuration was made but not deployed, and in that case there's nothing more to do and all is good.
But if the change was deployed and it still doesn't work, then this needs a (non-urgent) fix, and the wiki creation procedure must probably be updated.