Twig error

Hello

After install I’ve got following error.

Recoverable fatal error: Object of class Twig_Source could not be converted to string in /wp-content/plugins/shopmagic-for-woocommerce/vendor/twig/twig/lib/Twig/Lexer.php on line 87

PHP version is 7.2.7, but doesn’t work either on version 5.6.x

Thank you,
Koen