V 1.0 needs this fix for PHP 7.3 and up.

Version 1.0 (01.09.2019) does not work with PHP 7.3.16 (and up?) unless you strip out the extra space after the closing ?> at the end of the …/includes/tcz-functions.php file. It did work with up to PHP 7.1 (I didn’t test 7.2).

Stripping out the space is easy, but this plugin needs to be updated to fix that.