I can not use my boot camp assistant. It appears encounter problems. how to solve it ?

There is no native boot available for Windows on Apple silicon.

If you need Microsoft Windows, you will need an emulator such as UTM and an Intel x86-64 Windows distribution, or (and this is the supported path) installing Parallels and booting with Windows for Arm as a guest.

https://support.microsoft.com/en-us/windows/options-for-using-windows-11-with-mac-computers-with-apple-m1-and-m2-chips-cd15fd62-9b34-4b78-b0bc-121baa3c568c

You cannot run Boot Camp on an Apple silicon mac.