60388: User display name not providedPositive FeedbackNegative FeedbackERROR: 60388error-60388 page anchorPositive FeedbackNegative FeedbackVERIFYERROR Descriptiondescription page anchorPositive FeedbackNegative FeedbackUser display name not provided Possible causespossible-causes page anchorPositive FeedbackNegative FeedbackThe User display name in the request is missing. Possible solutionspossible-solutions page anchorPositive FeedbackNegative FeedbackCheck that the User display name in the request body is provided.