Errors compiling an android kernel

I have a Xiaomi Redmi Note 5, and I wanted to install this kernel

The problem is that its my first kernel compilation and I can’t compile it due to some errors:

   CC      drivers/bluetooth/btfm_slim.o drivers/bluetooth/btfm_slim.c:26:23: fatal error: btfm_slim.h: No such file or directory  #include <btfm_slim.h>                        ^ compilation terminated. scripts/Makefile.build:282: recipe for target 'drivers/bluetooth/btfm_slim.o' failed make[2]: *** [drivers/bluetooth/btfm_slim.o] Error 1 scripts/Makefile.build:489: recipe for target 'drivers/bluetooth' failed make[1]: *** [drivers/bluetooth] Error 2 Makefile:998: recipe for target 'drivers' failed make: *** [drivers] Error 2 root@arnau-VirtualBox:/home/arnau/Escritorio/android/kernel# make headers_check   CHK     include/generated/uapi/linux/version.h 

And this error:

 scripts/Makefile.build:489: recipe for target 'sound/soc/msm' failed make[2]: *** [sound/soc/msm] Error 2 scripts/Makefile.build:489: recipe for target 'sound/soc' failed make[1]: *** [sound/soc] Error 2 Makefile:998: recipe for target 'sound' failed make: *** [sound] Error 2 

How do I solve it? I’m using Ubuntu 18.04 in Virtualbox.