Comment 31 for bug 1878045

Hi everybody,
my wifi (BCM43228) was working fine on focal with kernel 5.8. generic
But when I updated to groovy wifi does not work neither on 5.10 nor 5.11 generic.
I tried a lot of things, but nothing worked so far. Also not the solution described above. I get the messages:

Loading new broadcom-sta-6.30.223.271 DKMS files...
Building for 5.10.11-051011-generic
Building initial module for 5.10.11-051011-generic
ERROR (dkms apport): kernel package linux-headers-5.10.11-051011-generic is not supported
Error! Bad return status for module build on kernel: 5.10.11-051011-generic (x86_64)
Consult /var/lib/dkms/broadcom-sta/6.30.223.271/build/make.log for more information.
dpkg: error processing package broadcom-sta-dkms (--configure):
 installed broadcom-sta-dkms package post-installation script subprocess returned error exit status 10
Errors were encountered while processing:
 broadcom-sta-dkms

Anybody has an idea what I can do?
(Sorry for any mistakes/fauxpas... I am a newbie)