Makefile cant find c and asm-Files.

[NilsBoehm]

I have problems running make with the Makefile.
When doing so it tells me that it is not able to find the *.c and *.asm files.

Edit It seems like the problems is not with make itself.
The find command does not find files using the powershell or cmd either.

Besides that, it prints this to the console:
x86_64-elf-ld -n -o dist/x86_64/kernel.bin -T targets/x86_64/linker.ld &&
cp dist/x86_64/kernel.bin targets/x86_64/iso/boot/kernel.bin &&
grub-mkrescue /usr/lib/grub/i386-pc -o dist/x86_64/kernel.iso targets/x86_64/iso

This is the error I get in the end.
make: *** [Makefile:26: build-x86_64] Error 1