Modprobe: ERROR: could not insert 'nvidia': Exec format error

nvidiafb was already blacklisted

but now I did it like you told the other guy here:

sudo dkms remove nvidia/510.73.05

Error! Invalid number of parameters passed.
Usage: remove <module>/<module-version> --all
   or: remove <module>/<module-version> -k <kernel-version>

so I did sudo dkms remove nvidia/510.73.05 --all

-------- Uninstall Beginning --------
Module:  nvidia
Version: 510.73.05
Kernel:  5.13.0-41-generic (x86_64)
-------------------------------------

Status: Before uninstall, this module version was ACTIVE on this kernel.

nvidia.ko:
 - Uninstallation
   - Deleting from: /lib/modules/5.13.0-41-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.


nvidia-modeset.ko:
 - Uninstallation
   - Deleting from: /lib/modules/5.13.0-41-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.


nvidia-drm.ko:
 - Uninstallation
   - Deleting from: /lib/modules/5.13.0-41-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.


nvidia-uvm.ko:
 - Uninstallation
   - Deleting from: /lib/modules/5.13.0-41-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.


nvidia-peermem.ko:
 - Uninstallation
   - Deleting from: /lib/modules/5.13.0-41-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

depmod....

DKMS: uninstall completed.

------------------------------
Deleting module version: 510.73.05
completely from the DKMS tree.
------------------------------
Done.

sudo dkms install nvidia/510.73.05

Creating symlink /var/lib/dkms/nvidia/510.73.05/source ->
                 /usr/src/nvidia-510.73.05

DKMS: add completed.

Kernel preparation unnecessary for this kernel.  Skipping...
applying patch disable_fstack-clash-protection_fcf-protection.patch...patching file Kbuild
Hunk #1 succeeded at 82 (offset 11 lines).


Building module:
cleaning build area...
unset ARCH; [ ! -h /usr/bin/cc ] && export CC=/usr/bin/gcc; env NV_VERBOSE=1 'make' -j16 NV_EXCLUDE_BUILD_MODULES='' KERNEL_UNAME=5.13.0-41-generic IGNORE_XEN_PRESENCE=1 IGNORE_CC_MISMATCH=1 SYSSRC=/lib/modules/5.13.0-41-generic/build LD=/usr/bin/ld.bfd modules........
Signing module:
 - /var/lib/dkms/nvidia/510.73.05/5.13.0-41-generic/x86_64/module/nvidia-drm.ko
 - /var/lib/dkms/nvidia/510.73.05/5.13.0-41-generic/x86_64/module/nvidia-uvm.ko
 - /var/lib/dkms/nvidia/510.73.05/5.13.0-41-generic/x86_64/module/nvidia-modeset.ko
 - /var/lib/dkms/nvidia/510.73.05/5.13.0-41-generic/x86_64/module/nvidia.ko
 - /var/lib/dkms/nvidia/510.73.05/5.13.0-41-generic/x86_64/module/nvidia-peermem.ko
Secure Boot not enabled on this system.
cleaning build area...

DKMS: build completed.

nvidia.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-41-generic/updates/dkms/

nvidia-modeset.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-41-generic/updates/dkms/

nvidia-drm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-41-generic/updates/dkms/

nvidia-uvm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-41-generic/updates/dkms/

nvidia-peermem.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-41-generic/updates/dkms/

depmod...

DKMS: install completed.

rebooted
sudo modprobe nvidia -vv

modprobe: INFO: ../libkmod/libkmod.c:365 kmod_set_log_fn() custom logging function 0x5562d6da7b90 registered
insmod /lib/modules/5.13.0-41-generic/updates/dkms/nvidia.ko
modprobe: INFO: ../libkmod/libkmod-module.c:892 kmod_module_insert_module() Failed to insert module '/lib/modules/5.13.0-41-generic/updates/dkms/nvidia.ko': Exec format error
modprobe: ERROR: could not insert 'nvidia': Exec format error
modprobe: INFO: ../libkmod/libkmod.c:332 kmod_unref() context 0x5562d72f8490 released

cc -v

Using built-in specs.
COLLECT_GCC=cc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.4.0-1ubuntu1~20.04.1' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-Av3uEd/gcc-9-9.4.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1)

gcc -v

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.4.0-1ubuntu1~20.04.1' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-Av3uEd/gcc-9-9.4.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1)

locate nvidia.ko

/usr/lib/modules/5.13.0-40-generic/kernel/drivers/usb/typec/altmodes/typec_nvidia.ko
/usr/lib/modules/5.13.0-41-generic/kernel/drivers/usb/typec/altmodes/typec_nvidia.ko
/usr/lib/modules/5.13.0-41-generic/updates/dkms/nvidia.ko
/var/lib/dkms/nvidia/470.129.06/5.13.0-41-generic/x86_64/module/nvidia.ko