Title: WordPress 5.6 comptability Last modified: December 15, 2020 --- # WordPress 5.6 comptability * Resolved [Jean-Michel Ferrard](https://wordpress.org/support/users/jean-michel-ferrard/) * (@jean-michel-ferrard) * [5 years, 5 months ago](https://wordpress.org/support/topic/wordpress-5-6-comptability/) * Hello * I made a clone of my website with UpdraftPlus. * On this clone I updated WordPress from 5.5 to 5.6 * After this update, the Katex renderer gives me the error “KaTeX parse error: KaTeX doesn’t work in quirks mode.” instead of each math formula. * May I ask users (and of course the plugin developper) if there are issues concerning WordPress 5.6 and KaTeX? * Thanks in advance * Jean-Michel Ferrard Paris * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwordpress-5-6-comptability%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Author [Tom Churchman](https://wordpress.org/support/users/beskhue/) * (@beskhue) * [5 years, 2 months ago](https://wordpress.org/support/topic/wordpress-5-6-comptability/#post-14195335) * Hi, * This probably is unrelated to the WordPress version. The plugin works for me on versions 5.6 and 5.7. * Make sure you include a valid document type (``) in your theme. Also see [https://katex.org/docs/issues.html](https://katex.org/docs/issues.html). * Thread Starter [Jean-Michel Ferrard](https://wordpress.org/support/users/jean-michel-ferrard/) * (@jean-michel-ferrard) * [5 years, 2 months ago](https://wordpress.org/support/topic/wordpress-5-6-comptability/#post-14195734) * Hi, * As we say in france: mieux vaut tard que jamais. * Three months ago, I was reluctant to update WP because of this problem. * Receiving no answer, I decided to take the risk. And everything was fine. Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘WordPress 5.6 comptability’ is closed to new replies. * ![](https://ps.w.org/katex/assets/icon.svg?rev=1993573) * [KaTeX](https://wordpress.org/plugins/katex/) * [Frequently Asked Questions](https://wordpress.org/plugins/katex/#faq) * [Support Threads](https://wordpress.org/support/plugin/katex/) * [Active Topics](https://wordpress.org/support/plugin/katex/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/katex/unresolved/) * [Reviews](https://wordpress.org/support/plugin/katex/reviews/) ## Tags * [compatibility](https://wordpress.org/support/topic-tag/compatibility/) * [WordPress update](https://wordpress.org/support/topic-tag/wordpress-update/) * 2 replies * 2 participants * Last reply from: [Jean-Michel Ferrard](https://wordpress.org/support/users/jean-michel-ferrard/) * Last activity: [5 years, 2 months ago](https://wordpress.org/support/topic/wordpress-5-6-comptability/#post-14195734) * Status: resolved