I just attempted to upgrade my Kotlin Android project to use the "androidx" jetpack libraries rather than the old support libraries, and suddenly all my kotlin-android-extensions synthetic view properties are reporting errors in gradle build:

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch

Anyone have any troubleshooting advice?

Clean build+ IDE invalidate caches and restart

thanks, but I'm already building with

./gradlew clean build

shurgs

You have library conflicts most likely. Any library that still uses android support , you need to exclude it