Hi, everybody. Sorry for my English. I write through a translator. Don't kick too hard, I'm quite green in this.
Tell me.
I put KDE Neon next to Windows 10
Under the KDE, I allocated space and formatted it in ext4 with the mount point in /
And as soon as I start the installation a message

failed to mount a vfat file system at the boot/efi point

And the installation is not going. How can I fix this?

I read on the Internet that this error can be a consequence of the enabled option in "Quick start" in Windows.
I turned it off, but it didn't help.