title: Debug Spring Boot app: Source not found NativeMethodAccessorImpl.class
body: <p>So, I am building a REST API using Spring Boot App. I was able to debug it but suddenly I get this error when I try to debug the app as Spring boot app using Spring Tool Set:</p>
  
  <p><a href="https://i.stack.imgur.com/OeXcA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OeXcA.png" alt="enter image description here"></a></p>
  
  <p>I can run the application with any problem but can´t debug it:/.</p>
  
  <p>Do you guys know how to solve this? Where can I find this sources and how can I add them to my project?</p>