Warning: call_user_func() expects parameter 1 to be a valid callback, function ‘

  • yab1986

    (@yab1986)


    9 years, 1 month ago

    Hi there

    In the “Edit Staff Member” area I get following message in the Staff Photo section:
    Warning: call_user_func() expects parameter 1 to be a valid callback, function ‘sslp_staff_member_warning_meta_box’ not found or invalid function name in /home/tst/www/mypage.ch/wp-admin/includes/template.php on line 1048

    Is there any fix or hotfix which I can do?

    Many thanks for supporting.

    Best regards,
    Yab1986

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