Support » Fixing WordPress » Fatal error: Unknown: Cannot use output buffering

  • Hi, I’m using wp 3.9.1. I configured W3 Total Cache and I am receiving this error code: Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0.

    I found the issue may be the plugin called Autoptimize and / or the html section of W3 Total Cache. When I disable HTML minify settings: no error message. When I enable it and deactivate Autoptimize: no error message.

    Is there a fix for both plugin to make them compatible or just leave one or the other deactivated? And which one of these should I leave disabled?

    Mobile Locksmith

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  • Hi licketysplit;
    I’m the developer of Autoptimize. When using W3TC & AO together, you should not use the minification features (HTML, CSS & JS) of W3TC to avoid conflicts with the minification of AO. Alternatively you can just use W3TC minification and skip AO alltogether.

    Hope this helps,
    frank

Viewing 1 replies (of 1 total)
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