Hooray for the never-ending graphics driver bugs.
Please open cmd.exe and type the following
set QSG_INFO=1
cd \path\to\anki
anki
Replace \path\to\anki with the place you have Anki installed. Please paste the startup text you get here.
Then please try:
set QSG_RHI_BACKEND=opengl
anki
and
set QSG_RHI_BACKEND=vulkan
anki
and finally
set QT_OPENGL=software
anki
Do any of those help?