Key seems fine. Password works. Message seems broken. Post again in a code block in case the board formatting has corrupted anything.
$ gpg --import qr.keygpg: key DF0A574E9F979A7D: "yohi1234567 <yohi12345@protonmail.com>" not changedgpg: key DF0A574E9F979A7D: secret key importedgpg: Total number processed: 1gpg: unchanged: 1gpg: secret keys read: 1gpg: secret keys imported: 1$ gpg --list-keys~/.gnupg/pubring.kbx--------------------------------pub rsa2048 2023-12-14 [SC] 5FD2A650194CA07CAB62D4DCDF0A574E9F979A7Duid [ unknown] yohi1234567 <yohi12345@protonmail.com>sub rsa2048 2023-12-14 [E]$ gpg -d qr.txtgpg: assuming IDEA encrypted datagpg: [don't know]: invalid packet (ctb=3b)gpg: WARNING: encrypted message has been manipulated!gpg: [don't know]: invalid packet (ctb=15)