PHP Deprecated Error ni-function.php on line 8

We have ni-woocommerce-sales-report-pro. and PHP has updated it’s function rules.

PHP Deprecated: Optional parameter $filename declared before required parameter $columns is implicitly treated as a required parameter in /home/associat/public_html/www/wp-content/plugins/ni-woocommerce-sales-report-pro/include/ni-function.php on line 8

PHP thinks any varable that has a default value is ‘Optional’ and must come after all normal variables.

Line 8: function ExportToCsv($filename=’export.csv’,$rows,$columns,$format=”csv”){

Just set filename on next line if blank.