发现问题

firebase
  .messaging()
  .usePublicVapidKey(
    "BDYE2EYHdIp8qHjTKcJYPvO4PgaAH2pSruP55FOtNs5jWsgdeg7YK6OgJ0daSu21kN7aSzU19NRXRqC4bfITZYQ "
  );

在Firebase控制台中，密钥对旁边显示一个复制按钮.点击并粘贴...时，它将在密钥对的末尾添加一个随机空间.

In firebase console, theres a copy button that appears beside the key pair. When click on that and pasting....it adds a random space at the end of the key pair.