I've detected the "Nothing to display" problem in the course "Activity report" in my Moodle 2.7 with Oracle database. I've installed the last version of Hotpot module but I have not managed to solve the problem.
It seems there are no logs stored from students.
In the HotPot "Outline report" I can see the results of the attempts, but I can't see anything in the course "All logs" report.
The activity "Grade weighting" is set to 100.
Also, in the outline report, if development mode is on, I can see a warning for each attempt to resolve the activity:
Strict Standards: Non-static method hotpot::format_score() should not be called statically in /aplica/moodleora/www/moodle/mod/hotpot/lib.php on line 430
Thanks for your help