48000: Invalid request payloadPositive FeedbackNegative FeedbackERROR: 48000error-48000 page anchorPositive FeedbackNegative FeedbackFRONTLINEERROR Descriptiondescription page anchorPositive FeedbackNegative FeedbackThe callback request payload provided is invalid Possible Causespossible-causes page anchorPositive FeedbackNegative Feedback You might be using an old version of Frontline application. Possible Solutionspossible-solutions page anchorPositive FeedbackNegative Feedback Update your Frontline application.