An internal error occurred during: "Updating Maven Project”

This is all you need:

1. Right-click on your project, select Maven -> Remove Maven Nature.
2. Open you terminal, go to your project folder and do “mvn eclipse:clean”
3. Right click on your Project and select “Configure -> Convert into Maven Project”
4. mvn elcipse:eclipse
5. Then in Eclipse, I right-clicked my project(s) and then Maven > Update Project