This is a known issue, see Device not ending with _app breaking script · Issue #6 · Grumblezz/Home-Assistant-Notify-Mobile-Companion-App-Devices · GitHub and the short answer is that you have to have to follow these instructions from the FAQ of HA Companion App: Troubleshooting | Home Assistant Companion Docs
And this one:
Troubleshooting | Home Assistant Companion Docs