Installation seemed straightforward, thanks to the very full installation instructions. I can't pretend I fully understand it all, but it works. Up to now. I started the Practical Simfony course, which appears to be also very clear. Everything works as described, with no error messages, but the first page to be rendered (in 'Day 3' of the course) is simply a mess, lacking any form elements -- in fact the html generated does not include the words 'form' or 'input'. The image in the course shows a formatted form at this point. I cannot imagine where to begin looking for the problem.
Any suggestions? Or should I simply return to something I fully understand?
FWIW, I have checked the database -- it contains all the expected data. I also continued to 'Day 4' and added the page template. This loads in the browser, showing correct css. It is only the page content which is messed up.