Support » Plugin: WP Super Cache » FATAL ERROR

  • I’m currently on ver. 4.8 and I’m trying to use the WP Super Cache Plugin. Whenever I turn the caching function on, I keep getting:

    Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0

    I’m aware that there’s another thread for this same issue but it says it shouldn’t show up on the newest version of WP yet I’m still getting the issue. I don’t believe I have any conflicting plugins as I’ve tried deactivating the other plugins while leaving the Cache plugin on.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Ben

    (@benbornschein)

    After you disabled the other plugins, did you refreshed the cache in WP Super Cache?

    I sure did. I’ve since tried 2 different cache programs and neither one of them acts up in the same way as WP Super Cache.

    I have the exact same issue…

    This is showing in the error log:

    [19-Jul-2017 15:57:44 UTC] PHP Warning: array_map() expects parameter 1 to be a valid callback, function ‘mb_strtolower’ not found or invalid function name in /home/bbmedia/public_html/w/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 236
    [19-Jul-2017 15:57:44 UTC] PHP Fatal error: Call to undefined function mb_strtolower() in /home/bbmedia/public_html/w/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 255
    [19-Jul-2017 15:57:44 UTC] PHP Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0

    Reverting back to the previous version (WP Super Cache 1.4.9) corrected the issue for me…

    • This reply was modified 4 months, 3 weeks ago by  bluebearmedia.
Viewing 3 replies - 1 through 3 (of 3 total)
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