Mapbox GL issue on Raspberry Pi 4

Hello,
I transferred the project to rpi4 with 4gb RAM, qt installation was successful and I can compile the project. I have a problem with mapbox, when I run the example for mapbox, the map is white, there are markers on it, but no graphics, everything was successful during installation, and all plugins for mapbox were installed, including mapboxGL. When debugging a project, an error appears in the console:
QOpenGLContext is NULL!

Can anyone help me with this problem? I will add that on rpi3b + I also had a white screen, but this could be due to the mapboxGL not installed for mapbox.
On Nvidia Jetson nano mapbox works fine.

I'm working with Raspbian Buster.