php - debugging doesn`t return anything on Warning: Illegal string offset 'panels_info' -


i need solution on how proceed in fixing wordpress error:

fatal error: uncaught error: cannot use string offset array

code sample line 586: 

foreach( $panels_data[ 'widgets' ] $i => $widget ) {         $widget['panels_info']['widget_index'] = $i;         $row_index = intval( $widget['panels_info']['grid'] );         $cell_index = intval( $widget['panels_info']['cell'] );         $layout_data[ $row_index ]['cells'][ $cell_index ]['widgets'][] = $widget;     }      return $layout_data; }


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