@tbb2024 is there a line below that, probably gpg: Note: This key has expired! ?
It’s possible the copy of the gpg key you have is no longer up to date, you’ll need to update it to verify the signature.
You can do so wiith gpg --refresh-keys EF6E286DDA85EA2A4BA7DE684E2C6E8793298290 (see Refreshing the PGP key on this page)
If it just says bad signature and nothing else, make sure you were able to download the entire file and the download didn’t fail halfway through.