Fatal error: Uncaught Error: Class "Masterminds\HTML5\Parser\DOMTreeBuilder" not found in /var/www/html/includes/vendor/lullabot/amp/src/Utility/AMPDOMTreeBuilder.php:33
Stack trace:
#0 /var/www/html/includes/vendor/composer/ClassLoader.php(576): include()
#1 /var/www/html/includes/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/var/www/html/i...')
#2 /var/www/html/includes/vendor/lullabot/amp/src/Utility/AMPHTML5.php(52): Composer\Autoload\ClassLoader->loadClass('Lullabot\\AMP\\Ut...')
#3 /var/www/html/includes/vendor/masterminds/html5/src/HTML5.php(89): Lullabot\AMP\Utility\AMPHTML5->parse('<!DOCTYPE html>...', Array)
#4 /var/www/html/includes/vendor/lullabot/amp/src/AMP.php(395): Masterminds\HTML5->loadHTML('<!DOCTYPE html>...')
#5 /var/www/html/includes/vendor/lullabot/amp/src/AMP.php(454): Lullabot\AMP\AMP->getDOMQuery('<!DOCTYPE html>...', true)
#6 /var/www/html/modules/news/full-amp.php(67): Lullabot\AMP\AMP->convertToAmpHtml('<p>\xC2\xA0\xC4\x90\xE1\xBB\x83 \xC4\x91\xE1\xBA...')
#7 /var/www/html/modules/news/controller.php(33): require('/var/www/html/m...')
#8 /var/www/html/index.php(116): require('/var/www/html/m...')
#9 {main}
thrown in /var/www/html/includes/vendor/lullabot/amp/src/Utility/AMPDOMTreeBuilder.php on line 33