[HTTP 330] ERR_CONTENT_DECODING_FAILED
Lost CSS styling—frontend and backend
Gzip compressionHow To Optimize Your Site With GZIP Compression is a bit of a mixed bag. While it can improve data transfer speeds and, therefore, perceived better website performance at the client end, people should be careful using Joomla’s Gzip features if they don’t know how they work.
Misusing Joomla’s Gzip features can cause browser errors and can potentially result in you not being able to manage your website. There are two different problems relating to Gzip in Joomla: (1) content encoding errors and (2) loss of CSS styling—frontend and backend—also known as the J! 4 “double gzip” problem.