I have been using this plugin for a while now but a recent update must have broken something as users get the white screen after logging in. Reloading the home page (or any page) takes them there with a logged-in status.
Deactivating Sky Login Redirect solves the problem.
The plugin was originally installed for mobile users who are sent a link to download a newsletter. This plugin saves them having to navigate from their profile page to the download directory each time.
Newsletters are published on the third Sunday of each month so any help before the 16th would be a bonus!