Raspberry Pi - Chromium kiosk mode problems

I am using raspberry pi 3b+. I created an web-application using Python and Flask. And I want this application to start when I start the raspberry pi. After writing all the codes, I got such an error and I couldn't find what to do on the internet. Thanks in advance for the help.[3579:3579:0100/000000.567402:ERROR:gl_surface_egl.cc(831)] EGL Driver message (Error) eglCreateContext: dri2_create_context [3579:3579:0100/000000.576778:ERROR:gpu_init.cc(486)] Passthrough is not supported, GL is egl, ANGLE is