I have created a custom theme in Magento 2.3 which is extended from the blank theme.
I would like to use the luma layered navigation.
I have copied Magento_LayeredNavigation
folder from /vendor/magento/theme-frontend-luma
to my theme path app/design/frontend/vendor/theme/
and ran the static content deploy.
I then receive the following error message:
main.CRITICAL: variable @filter-quantity is undefined in file magento-install/var/view_preprocessed/pub/static/frontend/vendor/theme/en_GB/Magento_LayeredNavigation/css/source/_module.less in _module.less on line 105, column 29 103| 104| &-value { 105| .lib-css(color, @filter-quantity); 106| } 107| 108| &-options { {"exception":"[object] (Magento\Framework\View\Asset\ContentProcessorException(code: 0): variable @filter-quantity is undefined in file magento-install/var/view_preprocessed/pub/static/frontend/vendor/theme/en_GB/Magento_LayeredNavigation/css/source/_module.less in _module.less on line 105, column 29 103| 104| &-value { 105| .lib-css(color, @filter-quantity); 106| } 107| 108| &-options { at magento-install/vendor/magento/framework/Css/PreProcessor/Adapter/Less/Processor.php:97)"} []