它看起来像是配置问题. ASP.NET的可见性权限.

请关注主题以获取更多详细信息.这个人有同样的问题，看起来已经解决了:
Crystal Reports在Web查看器中不可见的图像 [ ^ ]

It looks like a configuration issue. Visibility permission to ASP.NET.

Follow the thread for more details. This guy had same issue and looks like resolved:
Crystal Reports images not visible in web viewer[^]