I cannot verify the .asc file with instructions provided in README-HOWTO-GPG-VERIFY-TEAM-MEMBERS-KEY.txt neither with README-HOWTO-GPG-VERIFY.txt in the litecoin downloads website.
I’ve downloaded the litecoin-0.21.2.tar.gz both with .asc file. And after I run theses command I got an error:
$ gpg --keyserver pgp.mit.edu --recv-key FE3348877809386C
gpg: key FE3348877809386C: 3 duplicate signatures removed
gpg: key FE3348877809386C: 20 signatures not checked due to missing keys
gpg: key FE3348877809386C: "Adrian Gallagher <thrasher@addictionsoftware.com>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
$ gpg --verify litecoin-0.21.2-x86_64-linux-gnu.tar.gz.asc
$ gpg: assuming signed data in 'litecoin-0.21.2-x86_64-linux-gnu.tar.gz'
$ gpg: Signature made Sat May 7 03:45:39 2022 UTC
$ gpg: using RSA key D35621D53A1CC6A3456758D03620E9D387E55666
$ gpg: Can't check signature: No public key