30028: Invalid API versionPositive FeedbackNegative FeedbackERROR: 30028error-30028 page anchorPositive FeedbackNegative FeedbackPROGRAMMABLE SMSERROR Descriptiondescription page anchorPositive FeedbackNegative FeedbackAPI version used in the request is invalid Possible Causespossible-causes page anchorPositive FeedbackNegative FeedbackAPI version is not specified or is not either 2008-08-01 or 2010-04-01 Possible Solutionspossible-solutions page anchorPositive FeedbackNegative FeedbackUse API version 2008-08-01 or 2010-04-01