DHL doesn't work

Question

There are some old questions about DHL but it doesn't work.
I've alread sent a tracking ID by mail but I think that my mails doesn't arrive to destination.

Comments

As of today, posted 7 parcels with DHL. The direct links to the DHL website work (currently in the status of having been picked up from the post office), the app however is unable to load any tracking data ("Fehler beim Laden der Daten"). Seems to be permanently broken. Quite a pity as this makes a package tracking app useless.