title: Can't create Docker network
body: <p>I've been able to start my Docker application without a problem but suddenly I get this error:</p>
  
  <blockquote>
    <p>failed to parse pool request for address space "LocalDefault" pool ""
    subpool "": could not find an available, non-overlapping IPv4 address
    pool among the defaults to assign to the network</p>
  </blockquote>
  
  <p>I'm running Docker 1.12.6.</p>
  
  <p>How do I fix this?</p>