title: Maven: Failed to transfer file XXX Return code is: 501 , ReasonPhrase:HTTPS Required
body: <p>I'm getting an unexpected 501 error code when building my maven project. The message says HTTPS is required but i haven't changed my settings.xml.</p>
  
  <p>How can i check if something has changed in my configuration?</p>
  
  <p>How can i get things to work?</p>