I'm trying to change the background of a product category using custom fields, I'm building it with Oxygen Builder. I've built out a product category template with a taxonomy pointing to Category (product_cat) and I'm using that custom field in the product category, however, the background image of that product category isn't changing in the front end?
In case of using Oxygen Builder, please reach out to them if you have any issues with installation, configuration, compatibility, or usage.
Refer to our support policy https://metabox.io/support/topic/support-policy/
To make sure the Meta Box works correctly, you can try to deactivate all plugins except Meta Box, MB extensions and switch to the standard theme of WordPress (Twenty TwentyTwo) then follow this documentation to add the code to the archive template file in the theme to display the images https://docs.metabox.io/extensions/mb-term-meta/#getting-field-value
Or you can try to use the field single_image instead of image_advanced.
Can you please share some screenshots of the Plugins page on your site? And the code that you are using to output the field value?
Please notice that the builder Oxygen ignores the theme functions, and templates from loading so if you add the code to the theme template file but still activate Oxygen, the code will not be executed.