Output Buffering Issues

  • Hi,

    I keep getting this error for every link on the sidebar of the linked page – “Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0.” I’ve seen it crop up on other pages on the site as well. Refreshing the page makes the error go away.

    For some reason this problem doesn’t happen for logged-in users. Optimize for logged-in users is turned off.

    I’ve tried to exclude cv.js with Minify excluded deselected, but it didn’t help. Currently using WP Rocket with their Minify HTML option turned on, and not Optimize HTML in AO.

    TBH, I’m not even sure it’s an AO issue, but this error comes up a lot in relation to AO.

    The page I need help with: [log in to see the link]

Viewing 7 replies - 1 through 7 (of 7 total)
  • Plugin Author Optimizing Matters

    (@optimizingmatters)

    could be a conflict between Autoptimize and another plugin using the output buffer Henry, you could try recursively searching the entire wp-content/plugins folder for the ob_ string and take it from there OR systematically disable plugins one at a time to try to find the culprit?

    Thread Starter Henry

    (@henrybaum)

    Thanks – I think it’s All in One SEO. Turning off SEO for those pages has fixed the issue. Do you know about any conflicts?

    Plugin Author Optimizing Matters

    (@optimizingmatters)

    hmmm … so do they have logic to replace the title somehow, could be that?

    Thread Starter Henry

    (@henrybaum)

    Sorry, I spoke too soon. Still broken, but better somehow. Where is ob_start normally found in plugins?

    Plugin Author Optimizing Matters

    (@optimizingmatters)

    could be in any PHP-file really :-/

    AIOSEOP dev here. We use output buffering to rewrite the title tag. We plan on moving away from output buffering entirely in the future.

    Plugin Author Optimizing Matters

    (@optimizingmatters)

    have you been able to get this working/ pinpoint it @henrybaum ?

Viewing 7 replies - 1 through 7 (of 7 total)
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