no dice. It seems that safari also doesn't work. Neither does clicking through the buttons.
the following error message seems to be part of the problem;
Error code: filenotfound
* line 467 of \lib\setuplib.php: moodle_exception thrown
* line 1918 of \lib\filelib.php: call to print_error()
* line 3990 of \lib\filelib.php: call to send_file_not_found()
* line 38 of \pluginfile.php: call to file_pluginfile()