Fatal error: Uncaught TypeError: Argument 1 passed to Twig\Lexer::__construct() must be an instance of Twig\Environment, instance of Twig_Environment given, called in /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/lib/Config/Renderer.php on line 92 and defined in /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/vendor/twig/twig/src/Lexer.php:56 Stack trace: #0 /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/lib/Config/Renderer.php(92): Twig\Lexer->__construct(Object(Twig_Environment), Array) #1 /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/lib/Config/Renderer.php(49): MailPoet\Config\Renderer->setupSyntax() #2 /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/lib/Subscribers/NewSubscriberNotificationMailer.php(39): MailPoet\Config\Renderer->__construct(true, false) #3 /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(637): MailPoet\Subscribers\NewSu in /homepages/16/d291157637/htdocs/SOLVEIG2018/wp-content/plugins/mailpoet/vendor/twig/twig/src/Lexer.php on line 56