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Wordpress 5.1 Multi-site
PHP 5.6
Since I activated the plugin I get this error:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in /home/www/public_html/file/wp-includes/class-wp-hook.php on line 286
And I don’t see a ‘Social Wall’ configuration link in ‘User Pro’ section
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