Hi! I've found a common issue that happens after updating IntelliJ to 2019.2 if you work with an old Gradle version (e.g. Forge Modding)
Issue Description:
When you update the ide to 2019.2
you get this error https://github.com/gradle/gradle/issues/8431#issuecomment-516628795 because from that version IntelliJ boots up with Java 11 by default
the issue is the gradle version that is shipped with forge 1.12.2 is incompatible with java 11 and so you get that error
To fix this I've changed the Java version the IDE boots up with from 11 to 8 this way --> https://github.com/gradle/gradle/issues/8431#issuecomment-51668498
I spent a lot of time on this to try to make it work fine so I would propose to add it to this topic so that other modders are warned of this issue https://www.minecraftforge.net/forum/topic/61757-common-issues-and-recommendations/
I'm fairly new to this forum, I hope I've done this correctly