Unable to build extra modules (DKMS) with custom kernels anymore

Hi, an attempt to update a custom kernel from [chaotic aur] failed configuring extra modules: chaotic-nvidia-dkms (chaotic aur) and broadcom-wl-dkms (AUR).
I tried installing linux-fsync kernel [valveaur] and encountered the same fail in configuring both modules.
Only manjaro stock kernels now works with DKMS. I wonder if the recent manjaro stable upgrade pushed some gcc update that is causing this.

More info:

Aggiornamento chaotic-nvidia-dkms-tkg (450.66-2 -> 450.66-3)... Aggiornamento chaotic-nvidia-settings-tkg (450.66-2 -> 450.66-3)... Aggiornamento lib32-chaotic-nvidia-utils-tkg (450.66-2 -> 450.66-3)... Esecuzione post-transaction hooks... Creating system user accounts... Reloading system manager configuration... Arming ConditionNeedsUpdate... Install DKMS modules ==> dkms install --no-depmod -m nvidia -v 450.66 -k 5.4.58-1-MANJARO ==> dkms install --no-depmod -m nvidia -v 450.66 -k 5.8.3-6-tkg-pds Error! Bad return status for module build on kernel: 5.8.3-6-tkg-pds (x86_64) Errore nella configurazione di Consult /var/lib/dkms/nvidia/450.66/build/make.log for more information. ==> Warning, dkms install --no-depmod -m nvidia -v 450.66 -k 5.8.3-6-tkg-pds' returned 10 ==> depmod 5.4.58-1-MANJARO ==> depmod 5.8.3-6-tkg-pds Updating the desktop file MIME type cache... Transazione completata con successo.

I attached /var/lib/dkms/nvidia/450.66/build/make.log

So i would try to build the linux-fsync kernel from (AUR), but it gives me a PGP key signature error.