Try to add this to .toml:

[versions]
kotlin_jvm = "2.1.20-RC"
// ...

[plugins]
kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin_jvm" }

and add this to project .gradle file:

plugins {
    // ...
    alias(libs.plugins.kotlin.jvm) apply false
}