Error52105: Invalid GCM/FCM package namePositive FeedbackNegative FeedbackDescriptiondescription 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.