While launching examples such as minimal map, plane spotter, places map  the maps are not displayed at all.

In Mapviewer or places exmaples there is a possibility of selecting plugins: only ersi plugin map provider is rendered.
In all other 5 cases, the maps are "blank" (including osm, mapboxgl).

On ubuntu linux osm and mapboxgl plugins are displayed properly.

Tested on Windows 10, MinGW64 bits, Qt 5.12.2 from the online installer.