Print() String FormatException

Print("{\"error\":false,\"message\":\"\",\"session\":\"7COIe3hmmTwL8OpIAwd3141\"}\r\n")

Exception has occurred: CLR/System.FormatException

An exception of type 'System.FormatException' occurred in System.Private.CoreLib.dll but was not handled in user code: 'Input string was not in a correct format.'