Wrong Manifest.mf in IntelliJ IDEA created .jar

To fix:

1. File > Project Structure
2. Under Project Settings on the left, select "Artifacts"
3. Find the JAR definition In the middle pane and select it
4. In the left pane of the "Output Layout" tab find the jar file in the list and select it
5. At the bottom, click the "Use Existing Manifest" button and select the manifest file that is in your project source.
6. Click OK and run the build

I had the same problem.

Make sure your MANIFEST.MF is in:

src/main/resources/META_INF/

NOT

src/main/java/META_INF/