intellij-idea-artifact-xxxxwar-exploded-has-invalid-extension

1. Stop/undeploy your current artifact deployment Edit your run config,

2. and in the Deployment tab, remove the current exploded war/ear

3. artifact Open the project’s Artifacts settings and add a new artifact

1. Use the plus button to add a new war or (in my case) ear exploded
   artifact
   

2. Give it a name, then edit the Output directory to add the appropriate extension (.war or .ear)
   

3. In the Output Layout section where you see , use the plus button to add an Artifact
   

4. Select the desired exploded artifact
   

5. Edit your run config again, and in the Deployment tab, add the new workaround exploded artifact