Installation of Kernel 5.14 doesn't create a grub menu entry

I found my issue:
I had a faulty/unnecessary 41_snapshots-btrfs in my /etc/grub.d. Just deleted it (I’m using ext4). Googling the .new really helped :wink:
Thanks for the hints!
And here is the beer:
:beer: :beer: :beer:
:beer: :beer: :beer: