Fenom, Tokenizer и Mpdf

Добрый день коллеги! Имею не приятную ошибку которую никак не могу понять как поправить.
создаю простой сниппет с кодом:

require_once $modx->getOption('base_path')."vendor/autoload.php";
$mpdf = new \Mpdf\Mpdf();
$mpdf->WriteHTML('<h1>Hello world!</h1>');
$mpdf->Output();

помещаю сниппет на страницу с пустым шаблоном,
pdf не рисутеся и получаю ошибки вида

Warning: Unexpected character in input: '' (ASCII=4) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=14) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=20) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=2) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=4) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=14) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=20) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=2) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=4) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=14) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=20) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=2) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=4) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=14) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=20) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

Warning: Unexpected character in input: '' (ASCII=2) state=0 in /home/c/ck53758/site.ru/core/components/pdotools/vendor/fenom/fenom/src/Fenom/Tokenizer.php on line 180

на сервере модуль включен Tokenizer

Tokenizer Support	enabled

настройки PdoTools следующие:

Все плагины и сам движок обновлены до последних версий. PHP 7.1

Друзья прошу помощи не проходите мимо!)))

echo $mpdf->Output();
die;