Custom table Meta Box and Oxygen Builder

Hi!
I'm using Oxygen Builder, the custom fields that are stored in a custom table are working well on post types, but the taxonomies.

For ex:
On a single post template, I can easily put an Image element on Oxygen builder and put the fields name for it. The same for creating a Gallery, just need the field name and everything is done.

But I can not do the same for the terms, it keeps saying no image found although I double checked the field name.

Thank you.