On 23/11/2021 09.51, attila wrote:
   ERROR: Kernel configuration is invalid.
          include/generated/autoconf.h or include/config/auto.conf are missing.
          Run 'make oldconfig && make prepare' on kernel src to fix it.

Something has corrupted your local kernel header installation. Do(did) you have other -dkms packages installed?

You could check the status of your packages with
  dpkg --verify

If you reinstall the affected package(s), the missing/broken files will be repaired and the module should build afterwards.

apt-get install --reinstall <pkg>...


Andreas

PS: If you can find the source of this corruption (which is likely to reappear in the future), we would be really thankful. This is not the first time it happened ...

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