I'm asking regarding the ACF plugin (Advanced Custom Fields)

I'm working on creating a category group that will add custom fields to the category pages. These are the fields:

They seem to work in storing the data (I can see the data is saved with an example category)

According to the docs, I'm supposed to use get_field in the template files to get the value of the custom field. I'm in the category.php template, and using get_field returns nothing for me. Here is what I've tried:

$sub_heading = get_field("sub_heading");

That should get the sub heading, but it just returns nothing.

I also tried

$sub_heading = get_field("sub_heading", $cat->term_id)

The category page is displaying the category properly, and giving me the title and the description, but nothing is being returned from get_field.

I'm asking regarding the ACF plugin (Advanced Custom Fields)

I'm working on creating a category group that will add custom fields to the category pages. These are the fields:

They seem to work in storing the data (I can see the data is saved with an example category)

According to the docs, I'm supposed to use get_field in the template files to get the value of the custom field. I'm in the category.php template, and using get_field returns FALSE (bool). 

Here is my code:

$sub_heading = get_field("sub_heading");

That should get the text that's stored in the "sub_heading" custom field, but instead it just returns FALSE (bool).

I also tried

$sub_heading = get_field("sub_heading", $cat->term_id)

The category page is displaying the category properly, and giving me the title and the description, but nothing is being returned from get_field.