SOLVED: Fedora 40 "You must install or update .NET to run this application."

[jonm]

I've installed 10.9.4 using the rpms from rpmfusion. 

When I try and run jellyfin I get: 

Code:

# ./jellyfin
You must install or update .NET to run this application.
App: /usr/lib64/jellyfin/jellyfin
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '8.0.0' (x64)
.NET location: /usr/lib64/jellyfin/

No frameworks were found.
Learn more:
https://aka.ms/dotnet/app-launch-failed
To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=8.0.0&arch=x64&rid=linux-x64&os=fedora.40

However it is already there - it was installed as a dependency, and when I try and (re) install it I get: 

Code:

# dnf install aspnetcore-runtime-8.0
Last metadata expiration check: 1:22:10 ago on Wed 05 Jun 2024 15:17:58 CEST.
Package aspnetcore-runtime-8.0-8.0.4-1.fc40.x86_64 is already installed.
Dependencies resolved.
Nothing to do.
Complete!

What could the problem be here?