Timber not working on php 5.3

I have a problem with Timber when running on php 5.3. Please help.

Fatal error: Uncaught exception ‘Twig_Error_Loader’ with message ‘The “/” directory does not exist.’ in /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/vendor/twig/twig/lib/Twig/Loader/Filesystem.php:93 Stack trace: #0 /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/vendor/twig/twig/lib/Twig/Loader/Filesystem.php(75): Twig_Loader_Filesystem->addPath(‘/’, ‘__main__’) #1 /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/vendor/twig/twig/lib/Twig/Loader/Filesystem.php(33): Twig_Loader_Filesystem->setPaths(Array) #2 /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/functions/timber-loader.php(222): Twig_Loader_Filesystem->__construct(Array) #3 /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/functions/timber-loader.php(230): TimberLoader->get_loader() #4 /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/functions/timber-loader.php(6 in /home/web4viet/domains/web4viet.com/public_html/wp-content/plugins/timber-library/vendor/twig/twig/lib/Twig/Loader/Filesystem.php on line 93

I rent hosting running php 5.3 so I can’t upgrade to php 5.4 and larger. Thanks!!!

https://wordpress.org/plugins/timber-library/