additionally to Stefans comment I allowed now `localhost` as referer for the map in our rule-set.
Please check again. The error should not occur again.
The idea behind is, that we want to reduce unnecessary calls to the map provider. Therefore `locahost` was not whitelisted.
the Web Component Team has replaced the used map provider see https://community.sw.siemens.com/s/question/0D54O00006O6Kg4SAF/new-web-components-version-19-usable-in-eu1-and-eu2 . The described behavior should only be during local development. As soon as the application is pushed to MindSphere and started via the Launch pad you should see a map again.
Could you please confirm that you see this only on when running locally.
Thanks and sorry for the inconvenient.