Error: Invalid or corrupt jar file

Hello.

I am trying to create a jar file.

After finishing my project, I went to “File” → “Project Structure”. Then I went to the "Artifacts" tab. On the second lane, I pressed the plus symbol. Chose “Add” → JAR → “From modules with dependencies”. Then I chose my main class and clicked ok. I also clicked "ok" in the Project Structure window. Then, I went to “Build” → “Build Artifacts…” and in the “Build Artifact” menu that appeared, I chose “Build”.

The .jar was created and it worked fine. However, later on I made some changes in the project and wanted to make a new version of the .jar file. I deleted the old one. Then I went to “Build” → “Build Artifacts…” and in the “Build Artifact” menu that appeared, I chose “Build”. I tried to open the .jar file and it prompted me with an error message: 

I guessed that the error was due to the fact that I chose “Build” and not “Rebuild” (without deleting the old one) here:

So I did the following:

• Went to “File” → “Project Structure” and in the “Artifacts” tab, I deleted the old artifact and created a new one. 
  Then went to “Build” → “Build Artifacts…” and in the “Build Artifact” menu that appeared, I chose “Build”. Didn't work.
• Went to “Build” → “Build Artifacts…” and in the “Build Artifact” menu that appeared, I chose “Rebuild”. Didn't work.
• Went to “Build” → “Build Artifacts…” and in the “Build Artifact” menu that appeared, I chose “Clean”, then went back again and chose “Build”. Didn't work.
• Went to “Build” and tried the "Build” → “Build Project” and  "Build” → “Rebuild Project” before going to “Build Artifacts…” and build/rebuild again. Didn't work.
• Completely deleted the “/out” and “src/META-INF” directories and creating them again from the “Project Structure” menu. Then “Build” → “Build Artifacts…” and build again.

I am out of ideas. My .jar file keeps giving me the error message shown above.

Any help would be appreciated.

Thanks in advance!