To fix this you can do some stuff.
Close valorant, restart your pc and check if that fixes the issue, if not then continue reading.
- Disable all sorts of antivirus protections, defenders, firewalls etc. These softwares may block the full injection.
- Only use one monitor, only keep one monitor plugged in.
- Use 1920x1080 100% scaling
- Make sure you are not in Fullscreen mode.