We currently have a problem with the product Parcel Shop Return on GLS Export DK. The bug which is related to a specific combination of receiver country and package counter means that some customers will not get a correct label back from the webservice at GLS.
We have informed our developers about this problem so they can resolve it. Please click the Follow button to be notified when a fix has been released.
Update: 22.10.2018: This fix has now been released on all platforms.