Warning: …function ‘upgrade_agp’ not found or invalid function name…

  • Resolved marikamitsos

    (@marikamitsos)


    5 years, 11 months ago

    Hello and thank you for your great work,

    WordPress v5.1.1
    Plugin v.3.3.0
    We are getting the following warning repeatedly:
    Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'upgrade_agp' not found or invalid function name in /wp-includes/class-wp-hook.php on line 288

    Could you please look into it?

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