Many thanks,
I disabled the cache plugin and opened the course to all, but the problem persists.
Also, if I edit it the quiz and then try to view it using its permalink (https://www.learningglue.com/quizzes/java-operators/) the questions do not appear.
Could it be that the quiz content is not found? Could this be a database issue? I have upgraded the database a couple of times, is there anyway to verify if those upgrades were successful?
Many thanks!
Andrew