Error upgrading to 2.3.0

Got the following server error after upgrading: Error: Call to undefined method XF\Style::getVariation() src/XF/CssRenderer.php:105

#0 src/XF/CssRenderer.php(80): XF\CssRenderer->setStyle(Object(XF\Style))
#1 src/XF/Pub/View/ServiceWorker/Offline.php(22): XF\CssRenderer->__construct(Object(XF\Pub\App), Object(XF\Template\Templater), NULL)
#2 src/XF/Mvc/Renderer/AbstractRenderer.php(91): XF\Pub\View\ServiceWorker\Offline->renderHtml()
#3 src/XF/Mvc/Renderer/Html.php(47)...

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