Sorl-Thumbnail returns error: "SuspiciousOperation: Attempted access to '/media/products/505.jpg' denied"
Solving "ImproperlyConfigured: Passing a 3-tuple to include()..." error after Django/Wagtail 2.0 upgrade
Elasticsearch fails with error "This can result in part of the JVM being swapped out. Increase RLIMIT_MEMLOCK (ulimit)". What to do?