(admin.E404) 'django.contrib.messages.context_processors.messages' must be enabled in DjangoTemplates (TEMPLATES) in order to use the admin application. code example

Example: ?: (admin.W411) 'django.template.context_processors.request' must be enabled in DjangoTemplates (TEMPLATES) in order to use the admin navigation sidebar.

add this code in context_processors
'django.template.context_processors.request'