on the wiki https://github.com/SuperMartijn642/Fusion/wiki/Setup-in-dev-environment
the maven link in this:
repositories {
exclusiveContent {
forRepository {
maven {
name = "Modrinth"
url = "https://api.modrinth.com/maven"
}
}
filter {
includeGroup "maven.modrinth"
}
}
}

doesnt work

or this one is the issue
dependencies {
// Fusion
implementation "maven.modrinth:fusion-connected-textures:-neoforge-mc"
}

(i use neoforge 1.21.1 and yes i used the correct one)