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If you long-press on the app icon in the launcher, does a menu pop up?
Yes
If so, what entries does it contain? Is there an "App info" menu entry? Is it greyed out?
App info is available
If you can get an App Info screen, does it have a "Notifications" entry near the middle of the screen? If so, is it greyed out?
Yes, I can enter the Notifications section. Inside, there is a greyed out button for "all notifications".
Additionally, inside the EPIM app, I have a section where I could set the alarm tone. This is now also greyed out with a comment saying that Android is preventing notifications of this type.
2 weeks ago everything was working fine. What could be the problem? The latest OS update? Should I try to reinstall the app and/or the Google framework?