Error in wp-admin panel

  • After installing the plugin POLYLANG error appeared in the wp-admin panel. It does not work properly adding pages to the added languages. Help please

    Jarek

    Warning: array_merge(): Argument #2 is not an array in /home2/mazury/public_html/wp-content/plugins/polylang/include/base.php on line 82
    Warning: in_array() expects parameter 2 to be array, null given in /home2/mazury/public_html/wp-content/plugins/polylang/include/base.php on line 86

    Warning: array_merge(): Argument #2 is not an array in /home2/mazury/public_html/wp-content/plugins/polylang/include/base.php on line 82
    Warning: in_array() expects parameter 2 to be array, null given in /home2/mazury/public_html/wp-content/plugins/polylang/include/base.php on line 86

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