Error during paypal express checkout

Hiya, I got an error, ... does it look familiar and any ideas on how to solve it?
Fatal error: Uncaught Twig_Error_Syntax: Unexpected token "string" of value "Completed" ("name" expected) in "extension/payment/pp_express_transaction.twig" at line 25. in /home/.../library/template/Twig/TokenStream.php:87 Stack trace: #0 /home/.../library/template/Twig/Extension/Core.php(304): Twig_TokenStream->expect(5) #1 /home/.../library/template/Twig/Extension/Core.php(277): Twig_Extension_Core->getTest(Object(Twig_Parser), 25) #2 /home/.../library/template/Twig/ExpressionParser.php(48): Twig_Extension_Core->parseTestExpression(Object(Twig_Parser), Object(Twig_Node_Expression_GetAttr)) #3 /home/.../library/template/Twig/ExpressionParser.php(78): Twig_ExpressionParser->parseExpression() #4 /home/.../library/template/Twig/ExpressionParser.php(41): Twig_ExpressionParser->getPrimary() #5 /home/.../library/template/Twig/ExpressionParser.php(5 in /home/...//library/template/Twig/TokenStream.php on line 87

Thanks for any help
Nancy

Check here viewtopic.php?t=192117