Invalid project name after IntelliJ update in Java Play SBT

Question

I've recently updated IntelliJ to version 2018.2, and since the update, I keep getting this error when trying to start my Java Play SBT project:

BUILD_NUMBER not defined, setting version: 
sbt.SettingKey$$anon$4@2ad8aeb5
[info] Loading settings from build.sbt ...
BUILD_NUMBER not defined, setting version: sbt.SettingKey$$anon$4@2ad8aeb5
[info] Set current project to [PROJECT_NAME] (in build file:/Users/username/Documents/Repos/[PROJECT_NAME]/)
[error] Not a valid project ID: [PROJECT_NAME]
[error] project [PROJECT_NAME]
[error]                      ^

I cannot find out why. I didn't change anything in my build.sbt or plugins.sbt files.

Answer 1

Probably your project structure was changed after update. Check your project modules. In my case root module was renamed to project-id. Renaming back that module to root(this was specified in my run configuration) solved the issue.