Avast One and Avast VPN

I have a new PC with Windows 11. I installed Avast One, no problem there. I then tried to install Avast VPN (i have a paid subscription for this). However Avast VPN looked like it was installing but never did. I tried a few times but it kept failing. So i uninstalled Avast One then installed Avast VPN and it worked no problem. But when i went to reinstall Avast One it said it could not install because i had Avast VPN installed. So why does it only let me install one or the other. Any help would be great.