![On some lessons IntelliJ won't run the Java program and instead this pops up. What exactly do I do with this to make it work again? : r/Hyperskill On some lessons IntelliJ won't run the Java program and instead this pops up. What exactly do I do with this to make it work again? : r/Hyperskill](https://i.redd.it/1skpwq01tpn71.jpg)
On some lessons IntelliJ won't run the Java program and instead this pops up. What exactly do I do with this to make it work again? : r/Hyperskill
![Starting a Vaadin Project in IntelliJ IDEA | Starting a Project | Get Started | Flow | Vaadin 14 Docs Starting a Vaadin Project in IntelliJ IDEA | Starting a Project | Get Started | Flow | Vaadin 14 Docs](https://vaadin.com/docs/v14/static/9b1b61234bfde92a312976fa07dfe794/bbbe8/tomcat9-run-config.png)
Starting a Vaadin Project in IntelliJ IDEA | Starting a Project | Get Started | Flow | Vaadin 14 Docs
![cannot run a new java file in a newly created project in intellij IDEA 2018.1 Ultimate – IDEs Support (IntelliJ Platform) | JetBrains cannot run a new java file in a newly created project in intellij IDEA 2018.1 Ultimate – IDEs Support (IntelliJ Platform) | JetBrains](https://intellij-support.jetbrains.com/hc/user_images/_0F9Mpq4MuP4EbajoDjE5g.png)
cannot run a new java file in a newly created project in intellij IDEA 2018.1 Ultimate – IDEs Support (IntelliJ Platform) | JetBrains
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