Hi Joakim,
this is a good starting point though.
You could set the debugging by enforcing it via the config.php file: https://docs.moodle.org/35/en/Debugging#In_config.php .
You could even try to follow the HTTP requests and responses using the Developer Tools of your browser e.g. by pressing <F12> and inspecting each requests recorded in the Network pane.
HTH,
Matteo