Warning: Undefined array key "excel" in /home/madbean/configurator.mapexdrums.com/post.php on line 11

Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /home/madbean/configurator.mapexdrums.com/post.php on line 11
posting the files
Warning: Trying to access array offset on value of type null in /home/madbean/configurator.mapexdrums.com/post.php on line 15

Fatal error: Uncaught TypeError: XLSXWriter::writeSheetHeader(): Argument #2 ($header_types) must be of type array, null given, called in /home/madbean/configurator.mapexdrums.com/post.php on line 15 and defined in /home/madbean/configurator.mapexdrums.com/vendor/mk-j/php_xlsxwriter/xlsxwriter.class.php:177 Stack trace: #0 /home/madbean/configurator.mapexdrums.com/post.php(15): XLSXWriter->writeSheetHeader('Products', NULL) #1 {main} thrown in /home/madbean/configurator.mapexdrums.com/vendor/mk-j/php_xlsxwriter/xlsxwriter.class.php on line 177