Can't check signature: No public key

[chensisi0730]

gpg: key 22BE0C62FFBFA548: "Thomas Nagy tnagy@waf.io" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
gpg: assuming signed data in 'waf-2.0.20.tar.bz2'
gpg: Signature made 2020年03月28日 16:57:43
gpg: using RSA key 8AF22DE5A06822E3474F3C7049B4C67C05277AAA
gpg: Can't check signature: No public key