RemoteServiceException

[westnordost]

Happens often, but only on Android 8

No idea yet where that comes from (and what is the cause)

android.app.RemoteServiceException: Bad notification for startForeground: java.lang.RuntimeException: invalid channel for service notification: Notification(channel=null pri=0 contentView=null vibrate=null sound=null defaults=0x0 flags=0x40 color=0x00000000 category=progress vis=PRIVATE)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1768)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:164)
	at android.app.ActivityThread.main(ActivityThread.java:6494)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)