title: What is the reason for a red exclamation mark next to my project in Eclipse?
body: <p>I have a red exclamation mark over my project name in Eclipse, looking like this - <a href="https://i.stack.imgur.com/QOKrq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/QOKrq.png" alt="enter image description here"></a>.</p>
  
  <p>Does anyone know what this means and what I should I do about it?</p>