Support » Plugin: Yoast SEO » Conflict between W3TC and Yoast SEO

  • Boris


    I’ve used Yoast SEO with W3 Total Cache on numerous websites, and have never had any problems. However, I am working on a new website and upgraded the Yoast plugin to the latest version ( and when I now activate W3TC, Minify doesn’t work. The error message in the source code says: DONOTMINIFY constant is defined

    After initial troubleshooting was fruitless, I googled and came across others: LINK and LINK, which led me to the Yoast SEO. And sure enough, when I disable Yoast, Minify works again. I’ve deleted the latest Yoast version and used version 1.2.8 instead, Minify works fine.

    Has Yoast responded to these issues already? I haven’t been able to find a reaction or a fix other than the workaround above.

    I’m using the latest WP (3.5) and W3TC ( versions.

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