[nodemon] app crashed - port in use - waiting for file changes before starting

node.js app

I got this yesterday, read online - tried to kill the server and restart - same issue and not fixed. Then I restarted the computer and this fixed it. This happened again this morning, noticeably when switching from one project to another.

Any ideas what I’m doing to cause this and how I can avoid it in the future. If this is considered a ‘bug’ i’ll move to that cat.