Running an OpenGL application on a VNCServer's screen?

Question

linux

I decided to run an application written in OpenGL (glut) on the phone. Compiled. Delivered vncserver according to this instruction.
I connect to the VNC server, everything works, I see the desktop, I try to start the application, the following error pops up: "OpenGL GLX extension not supported by display: 1".
What to do? How can I force it to display a window on the VNC server screen?
PS
I'm not using Termux, but UserLAnd.