How to solve M2EE error during Academy?

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I have been trying to complete the Become a Rapid Developer  course but for the past couple of hours I have been getting the same error: M2EE An error occurred while executing action 'update_appcontainer_configuration'.  This has popped up since the first time I tried to locally run the programm. I did continue the app but at this point I really want to see the output. All steps from Run Project  do work but when the system tries to open the app, it just doesn't want to work.    Anyone knows what to do?
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1 answers
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Yes, restarting the computer will terminate all running Java processes that were not completed well. After the restart, delete the deployment folder in your project directory and try running the app locally again. If it still does not start, you can change the port by going to Run → Edit Configuration in Mendix Studio Pro and setting a different application port (for example, 8081 instead of 8080), then run the app again.

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