title: collectstaic command fails gives me post-processing error
body: <p>While deploying my django-app to heroku I get this error .I disabled collectstatic and it pushed but when I went to the site it wasn't working.I tried a lot of things but nothing seems to work</p>
  <pre><code>Post-processing 'vendors/owl-carousel/assets/owl.carousel.css' failed!
  
  Traceback (most recent call last):
    File &quot;manage.py&quot;, line 21, in &lt;module&gt;
      main()
    File &quot;manage.py&quot;, line 17, in main
      execute_from_command_line(sys.argv)
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py&quot;, line 381, in execute_from_command_line
      utility.execute()
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py&quot;, line 375, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py&quot;, line 323, in run_from_argv
      self.execute(*args, **cmd_options)
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py&quot;, line 364, in execute
      output = self.handle(*args, **options)
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py&quot;, line 188, in handle
      collected = self.collect()
    File &quot;/app/.heroku/python/lib/python3.6/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py&quot;, line 134, in collect
      raise processed
  whitenoise.storage.MissingFileError: The file 'vendors/owl-carousel/assets/owl.video.play.png' could not be found with &lt;whitenoise.storage.CompressedManifestStaticFilesStorage object at 0x7f580a2b32e8&gt;.
  
  The CSS file 'vendors/owl-carousel/assets/owl.carousel.css' references a file which could not be found:
    vendors/owl-carousel/assets/owl.video.play.png
  
  Please check the URL references in this CSS file, particularly any
  relative paths which might be pointing to the wrong location.
  </code></pre>
  <p>my settings.py looks like this</p>
  <pre><code>&quot;&quot;&quot;
  Django settings for personal_portfolio project.
  
  Generated by 'django-admin startproject' using Django 2.2.4.
  
  For more information on this file, see
  https://docs.djangoproject.com/en/2.2/topics/settings/
  
  For the full list of settings and their values, see
  https://docs.djangoproject.com/en/2.2/ref/settings/
  &quot;&quot;&quot;
  import django_heroku
  import os
  
  # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
  BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  
  
  # Quick-start development settings - unsuitable for production
  # See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
  
  # SECURITY WARNING: keep the secret key used in production secret!
  SECRET_KEY = 'y5hmuk*-4*%wor)ek2up+w+x!yx8l40j*n93#1zn!p66)k=c#2'
  
  # SECURITY WARNING: don't run with debug turned on in production!
  DEBUG = True
  
  ALLOWED_HOSTS = []
  
  
  # Application definition
  
  INSTALLED_APPS = [
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
  
      'ckeditor',
      'ckeditor_uploader',
  
      'blog',
      'portfolio'
  ]
  
  MIDDLEWARE = [
      'django.middleware.security.SecurityMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.common.CommonMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
  ]
  
  ROOT_URLCONF = 'personal_portfolio.urls'
  
  TEMPLATES = [
      {
          'BACKEND': 'django.template.backends.django.DjangoTemplates',
          'DIRS': ['templates'],
          'APP_DIRS': True,
          'OPTIONS': {
              'context_processors': [
                  'personal_portfolio.custom_context.blog_context',
                  'personal_portfolio.custom_context.portfolio_context',
                  'django.template.context_processors.debug',
                  'django.template.context_processors.request',
                  'django.contrib.auth.context_processors.auth',
                  'django.contrib.messages.context_processors.messages',
              ],
          },
      },
  ]
  
  WSGI_APPLICATION = 'personal_portfolio.wsgi.application'
  
  
  # Database
  # https://docs.djangoproject.com/en/2.2/ref/settings/#databases
  
  # DATABASES = {
  #     'default': {
  #         'ENGINE': 'django.db.backends.postgresql_psycopg2',
  #         'NAME': 'portfolio_db',
  #         'USER': 'sajib1066',
  #         'PASSWORD': 'sajib1099',
  #         'HOST': 'localhost',
  #         'PORT': '',
  #     }
  # }
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
      }
  }
  
  # Password validation
  # https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
  
  AUTH_PASSWORD_VALIDATORS = [
      {
          'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
      },
  ]
  
  
  # Internationalization
  # https://docs.djangoproject.com/en/2.2/topics/i18n/
  
  LANGUAGE_CODE = 'en-us'
  
  TIME_ZONE = 'UTC'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  
  
  # Static files (CSS, JavaScript, Images)
  # https://docs.djangoproject.com/en/2.2/howto/static-files/
  
  # static files
  STATIC_URL = '/static/'
  STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'static'),
  ]
  
  # media files
  
  MEDIA_URL = '/media/'
  MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
  
  CKEDITOR_JQUERY_URL = 'https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js'
  
  CKEDITOR_UPLOAD_PATH = &quot;uploads/&quot;
  CKEDITOR_CONFIGS = {
      'default': {
          'toolbar': None,
      },
  }
  
  
  # Activate Django-Heroku.
  django_heroku.settings(locals())
  </code></pre>
  <p>I tried a lot for it to work but I am not able to figure out what's wrong.Please help!</p>