If the edit subscribers feature of digests is not working for you, except possibly the pagination feature, you are not alone. I haven’t had any issues with it in my development or test environments, but others have. Anyhow, there is now a solution if this is happening to you which is described in this post.
The fix will be rolled out in the next release of digests, version 3.2.16 which is in development.
Update October 10, 2019: According to this poster the <form> tag needs to have the novalidate attribute set as well. This post describes how this template can be appropriately changed.
