在DB网站上订德国夜车失败？

想在网上定夜车从柏林到阿姆斯特丹，结果到最后提示失败了是因为现在已经没有票了还是怎么回事？PS，我订的是6月22日的票求有经验的高手回答一下
失败提示如下：

Dear Customer,An error occurred during the Booking process for the night train. Please try again later. The error has been recorded. We apologise for any inconvenience.