set sourceCompatibility / targetCompatibility to 1.8
set sourceCompatibility / targetCompatibility to 1.8

- since 144.*, only Java 8 is supported

[1] https://intellij-support.jetbrains.com/hc/en-us/community/posts/206103139-IntelliJ-Platform-migrates-to-Java-8

uwolfer/gerrit-intellij-plugin