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