[Occurrence conditions]
The error occurs when a new Google Cloud Messaging project is created after September, 2016.
[Causes]
Owing to the integration of Google Cloud Messaging and Firebase Cloud Messaging.
[Workarounds]
Create a project in Firebase, not in Google Console.
[Handling methods]
Please read the document below.
https://www.intra-mart.jp/document/library/iap/public/setup/iap_setup_guide/texts/appendix/notice.html#android
-- Target ------------------------------------------------------------------------
iAP/Accel Platform/All Updates
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FAQID:630