I've been using Community Builder (CB) on a Joomla 2.5 website for a while without any problems. Yesterday I tried to install CB v2.0.13 on a clean Joomla 3.5 installation. The actual installation process finishes without any errors, but when I try to access any backend functionality of CB, i.e. the user management, the following error occurs:
Argument 1 passed to CBLib\Session\SessionState::__construct() must implement interface CBLib\Session\SessionInterface, null given
For development, I am using the Bitnami WAMP stack with PHP7. According to https://www.joomlapolis.com/news/18532-cb-2013-ready-for-joomla-35-and-php-70 CB 2.0.13 supports both, PHP7 & Joomla 3.5.
Has anybody come across the same issue and got an idea how to make CB work in my setup?