Class 'androidx.navigation.compose.NavHostKt' is compiled by an unstable version of the Kotlin compiler and cannot be loaded by this compiler

What does this mean? It happened after updating kotlin to 1.4.30 and compose to 1.0.0-alpha12.

Update navigation to the latest version if you haven’t already, and https://kotlinlang.slack.com/archives/CJLTWPH7S/p1613249284429500?thread_ts=1613247713.428600&channel=CJLTWPH7S&message_ts=1613249284.429500

Yep, make sure to upgrade to Navigation Compose alpha07, which is the only version compatible with Compose alpha12 as per the release notes: https://developer.android.com/jetpack/androidx/releases/navigation#compose-1.0.0-alpha07