I tried to install ctransifex on Joomla 3.5.1 and afterwards also tried with Joomla 3.4.8. Installation works, but after installation and configuration I'm unable to pull the language packs from Transifex. The popup window holding the 'Get data' buttons remains empty/ does not open. I did ask somebody else to test that and he encountered the same issue. Don't see any error messages in Joomla Debug and in the browser. No errors in the log files either.