HELP: Problems using mobileCaptureFor

I am trying to use the mobileCapture feature - when I open the document on a PC and click on the "Sign with Mobile Device" button - I get a message that "the requested feature is not available with the current license" Also i am unable to use the Position Anchors with the mobileCapture using the code below (this works with all the other methods ) .withPositionAnchor(TextAnchorBuilder.newTextAnchor("") .atPosition(TextAnchorPosition.BOTTOMRIGHT) .withSize(325, 100) ) ) I get the following exception Exception in thread "main" com.silanis.esl.sdk.internal.EslServerException: Could not upload document to package. Exception: HTTP POST on URI https://sandbox.esignlive.com/api/packages/TENmmJyYCwXKlQ054BZSvpyYsnM=/documents resulted in response with status code: [500, Internal Server Error]. Optional details: {"technical":"EsepCommand failed and no fallback available.","messageKey":"error.internal.default","message":"Unexpected error. We apologize for any inconvenience this may have caused you, please try again. If the problem persists, please contact our support team.","code":500,"name":"Unhandled Server Error"} at com.silanis.esl.sdk.service.PackageService.uploadApiDocument(PackageService.java:255) at com.silanis.esl.sdk.service.PackageService.uploadDocument(PackageService.java:240) at com.silanis.esl.sdk.EslClient.uploadDocument(EslClient.java:556)