52105: Invalid GCM/FCM package namePositive FeedbackNegative FeedbackERROR: 52105error-52105 page anchorPositive FeedbackNegative FeedbackNOTIFICATIONSERROR Error - 52105error---52105 page anchorPositive FeedbackNegative Feedback RtdNotification: Invalid GCM/FCM package namertdnotification-invalid-gcmfcm-package-name page anchorPositive FeedbackNegative Feedback Possible Causespossible-causes page anchor Application configuration problem. Possible Solutionspossible-solutions page anchor Make sure the message was addressed to a registration token whose package name matches the value passed in the request.