java.lang.ClassNotFoundException when running in IntelliJ IDEA

Question

I creating a program to work with databases and I am getting the following error when compiling in IntelliJ IDEA. Does anyone why this is happening and how I could solve it?

Answer 1

Here's what worked for me:

I deleted .ide folder, .iml file. And all other auto generated files by intelliJ then restarted my ide and I was asked if I want to make my project run with maven that's it.

Obviously I said yes :)