IDEA displays the message: "Kotlin version that is used for building with Maven (1.4.32) differs from the one bundled into the IDE plugin (1.4.32-release-371)". Does IDEA want non-existing version of maven plugin or I'm using wrong maven plugin repository for kotlin maven support?

This is a bug: https://youtrack.jetbrains.com/issue/KTIJ-7657. We hope to fix it soon in the next IDEA bugfix updates.