title: Django Page Not found error : Sudden in process of learning
body: <p>I was in motion of learning Django, suddenly encountered Page not found Error in all pages.
  This is my URL pattern file code:</p>
  
  <pre><code>from django.conf.urls import url, include
  from django.contrib import admin
  
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
      url(r'^analysis/', include('analysis.urls')),
      url(r'^music/', include('music.urls')),
  ]
  </code></pre>
  
  <p>but while accessing any of the pages page not found error is coming:
  I have run the server on port 8084,</p>
  
  <pre><code>python .\manage.py runserver 8084
  </code></pre>
  
  <p>Accessing urls:</p>
  
  <pre><code>http://127.0.0.1:8084/admin
  http://127.0.0.1:8084/music
  http://127.0.0.1:8084/analysis
  </code></pre>
  
  <p>All of the views are available and pages were previously displayed but now it is not working. I have tried re-starting the server also but no help.</p>
  
  <p>Kindly suggest me what could be the possibility of error.</p>