Communication to the server for an external pay unit is done in the following steps
1.The DynamicDeliverableStartedPopup is displayed when the ExtPu starts w request
2.The DynamicDeliverableDonePopup is displayed if no errors are found and the requested action (e.g. opening a gate) can be done
3.The DynamicDeliverableFailedPopup is displayed when an error is received from the server or the server cannot be contacted.
Each pop-up uses a label with the same name as the pop-up.
E.g. The name for DynamicDeliverableStartedPopup will be DynamicDeliverableStartedLabel
