This repository contains the source code of Contao 3.
Contao 3.5 is currently in the "security fixes only" phase of its long term support cycle and does not receive bug fixes anymore unless they fix a security vulnerability. It will reach its end of life in May 2019.
The source code of Contao 4 is maintained in several bundles that you can find in the Contao organization on GitHub. Please use the issue tracker of the respective bundle to report issues in Contao.