I was working on my HAM Radio project when I needed to undo some of the changes I made to the code and clone a new copy of the repository. However, whenever I try to open the new copy of the project in IntelliJ, it shows the files for a moment before they disappear, leaving only the .gitignore file, pom.xml file, the external libraries tab and the Scratches/Consoles tab. How do I get it so that I can see those files and am able to work on them?