Support » Plugin: Autoptimize » Getting an error when enabled on site

  • I enabled and set up this plugin on our site and it scored 100/100 on google page speed. I went to the site to check it out and got an intermittent error: Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0
    I’ve tried enabling only HTML, only CSS, and only JS, and I get the same error everytime. This plugin seems to do the job I wanted it to do, but it is breaking the site. We are running WordPress 4.0 with the Kallyas theme.
    Any help with this would be greatly appreciated.

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  • Plugin Author Frank Goossens


    In general this vague error is due to a combination with another plugin which probably is using the output buffer as well. You could temporarily disable other plugins selectively to try to find the plugin that is incompatible somehow.

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