如果图像 URL 不可公开访问，就会发生这种情况，因为 Stripe 必须能够从其服务器请求图像.如果您正在运行无法从外部访问的应用程序的本地副本，或者它位于 VPN 或身份验证之后，就会发生这种情况.

This can happen if the image URL is not publicly accessible, as Stripe has to be able to request the image from their servers. This can happen if you are running a local copy of the application which isn't accessible from the outside world, or if it is behind a VPN or authentication.