title: It does not work in tomcat servlet with eclipse
body: <p>I have installed tomcat with eclipse and I have a project with a servlet. Here I put the structure of both:</p>
  
  <p><img src="https://i.stack.imgur.com/XA6sW.jpg" alt="enter image description here"></p>
  
  <p>Until this day the steps followed to run the servlet were:</p>
  
  <p>1.Press button right above the following and give "Start"
  Tomcat </p>
  
  <p><img src="https://i.stack.imgur.com/J0sZW.jpg" alt="enter image description here"></p>
  
  <p>2.Once booted, press right button over "UsuarioServlet.java" / Run as / Run on server</p>
  
  <p><img src="https://i.stack.imgur.com/SowIx.jpg" alt="enter image description here"></p>
  
  <p>Done that everything worked properly but suddenly today when doing so I get the following:</p>
  
  <p><img src="https://i.stack.imgur.com/49V0O.jpg" alt="enter image description here"></p>
  
  <p>What happened?.</p>