This article applies only to version 1.0.0 of the DHL Shipping module for Magento 2.
In the checkout, the interactive map for DHL locations (Packstations, post offices) is not displayed.
The browser console shows a HTTP error 410.
The Mapbox API "Classic Style" which is used by the DHL Shipping module 1.0.0 is not supported anymore since June 2020.
Update the DHL Shipping module to the lastest version so that the Mapbox API "Modern Style" is used.