Ubuntu fix 'no device found' error for webcam on MacBook Pro (worked on early 2013 mbp model)

install_camera_firmware.sh

# https://askubuntu.com/a/991286/320092
git clone https://github.com/patjak/bcwc_pcie.git
cd bcwc_pcie
rm -rf firmware
git clone https://github.com/patjak/facetimehd-firmware.git firmware
cd firmware/
make
sudo make install
cd ..
make
sudo make install
sudo depmod
sudo modprobe -r bdc_pci
rm facetimehd.*
sudo modprobe facetimehd


# to make persistent after reboots
echo facetimehd | sudo tee -a /etc/modules

rabz@rabz:~/bcwc_pcie$ sudo make install make -C /lib/modules/5.13.0-39-generic/build M=/home/rabz/bcwc_pcie modules_install make[1]: Entering directory '/usr/src/linux-headers-5.13.0-39-generic' arch/x86/Makefile:148: CONFIG_X86_X32 enabled but no binutils support INSTALL /lib/modules/5.13.0-39-generic/extra/facetimehd.ko SIGN /lib/modules/5.13.0-39-generic/extra/facetimehd.ko At main.c:160:

• SSL error:02001002:system library:fopen:No such file or directory: ../crypto/bio/bss_file.c:69
• SSL error:2006D080:BIO routines:BIO_new_file:no such file: ../crypto/bio/bss_file.c:76
  sign-file: certs/signing_key.pem: No such file or directory
  DEPMOD /lib/modules/5.13.0-39-generic
  Warning: modules_install: missing 'System.map' file. Skipping depmod.
  make[1]: Leaving directory '/usr/src/linux-headers-5.13.0-39-generic'

What is this error?