# Theme error -\> A custom theme setting defined in package.json hasn't been used in any theme file

**URL:** <https://forum.ghost.org/t/theme-error-a-custom-theme-setting-defined-in-package-json-hasnt-been-used-in-any-theme-file/36752>\
**Category:** Developer help\
**Created:** [March 1, 2023, 6:29am UTC](https://forum.ghost.org/t/theme-error-a-custom-theme-setting-defined-in-package-json-hasnt-been-used-in-any-theme-file/36752 "2023-03-01T06:29:27Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Prathibha\_I\_Bilagi](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/prathibha_i_bilagi/32/23349_2.png) [@Prathibha\_I\_Bilagi](https://forum.ghost.org/u/Prathibha_I_Bilagi)\
**Post date:** [March 1, 2023, 6:29am UTC](https://forum.ghost.org/t/theme-error-a-custom-theme-setting-defined-in-package-json-hasnt-been-used-in-any-theme-file/36752/1 "2023-03-01T06:29:27Z")

</div>

Hi,  
We are facing a theme error issue. We have built using react tailwind with ghost api.

- URL - [https://blog.zeroswap.io/](https://blog.zeroswap.io/)
- Ghost Version → Ghost-CLI version: 1.21.0

 ![Screenshot 2023-03-01 at 11.52.00 AM](https://us1.discourse-cdn.com/flex015/uploads/ghost2/original/3X/d/4/d466734b9e2d937ab25efedbbcb47cb405ab775a.png)

---

<div class="post-metadata">

**Author:** ![markstos](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/markstos/32/18182_2.png) [@markstos](https://forum.ghost.org/u/markstos)\
**Post date:** [March 1, 2023, 3:03pm UTC](https://forum.ghost.org/t/theme-error-a-custom-theme-setting-defined-in-package-json-hasnt-been-used-in-any-theme-file/36752/2 "2023-03-01T15:03:34Z")

</div>

Either start using the mentioned custom Call to Action (CTA) variables or remove them from `package.json` to make the theme consistent.