[eclipse] Eclipse: "'Periodic workspace save.' has encountered a pro?blem."

Agree with @J-Dizzle,

I am a beginner in web-development and had a hard time solving this today. Had similar problems when I was creating a SpringBoot project in STS. Tried most of the solutions mentioned but they didn't work. Tried removing .metadata folder and re-building my springboot project but still nothing worked.

NOTE : I had multiple workspace in STS and this error occurred after migrating a project from one workspace to another.

Solution : All you need to do is restart your eclipse/STS IDE and it will work just fine.