Variable @button__shadow-active is undefined while running deploy static content in Magento 2

Question

I am getting this error whenever running php bin/magento setup:static-content:deploy.

It showing variable @button__shadow-active is undefined in file en_US/css/source/_extends.less in _extends.less. How to solve this. Kindly help me.

Answer 1

Simple ways to customize a theme's styles

Refer this document

Copy your _extends.less in parent theme to avoid undefined error