Can't verify Neon PGP Signatur, Kgpg broken?

I downloaded Neon and the pgp signature. But can’t verify it. Kgpg doesn’t work as it seems. If I try to start it, it does nothing (just the start animation). If I select both files I can “open” them with kgpg but it tells me.
“Decryption of these files failed” window but nothing else. Not a real window of Kgpg

Operating System: Fedora Linux 37
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Kernel Version: 6.4.6-100.fc37.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × 12th Gen Intel® Core™ i5-1240P
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: Framework
Product Name: Laptop (12th Gen Intel Core)
System Version: A4

Why not a sha hash like everyone else??

Thank you so much in advance