Portfolio category registration – where?

Hi, it seems that Enfold has compatability problems with CPTUI Plugin.
Therefor i need to know whre the portfolio category type is registered

Here is what the developer of CPT-UI says:

Because for some reason all 3 post types are getting the “Portfolio Category” taxonomy associated with them. It’s not something exclusively controlled by CPTUI in any given site. The theme may be using something like https://codex.wordpress.org/Function_Reference/register_taxonomy_for_object_type on all custom post types it finds. I can’t say for sure because I don’t have it in front of me. I recommend locating where that taxonomy is being registered and see what all it’s doing. I can only control settings saved by CPTUI.

You need to check in on the portfolio category registration and what all it’s doing, as it’s not one CPTUI controls. Possibly talk to the theme’s support people if you’re not sure.

So please let me know where i can found the information the delevoper is asking for.
thanx danny