I am going to write an Android push notification program and I want to use the tag-based subscription.
After I unsubscribe the default Push.ALL tag and subscribe another self-defined tag, I find that I cannot send the push notification from Bluemix (I just do it manually. I haven't set up a REST API). The error message is:
Internal server error. No devices found.
I am sure that I have registered the device as I can find my subscription records in Tags page of Bluemix. Before unsubscribing from the Push.ALL tag, I am able to send as well as receive the message.
How can I fix it?
Thanks!