I am slowly losing my mind............
I spent 20 solid hours over the last two days removing URL's from my quizzes (I know, I know Joseph and Gordon but whatever I did they caused a problem!) and then removing blank spaces (which I have no idea how they got there). Never mind, the main thing is this all got my quizzes working so I was happy!
BUT. I have used Michael Rottemeier's add-ons on some of my quizzes. I have also used another customised source file. Yesterday I was happy to see that, although nothing else worked, at least Moodle was OK with the add-on's. But today they don't work! I thought maybe if I put the altered source files in with my quizzes and uploaded them all it might help. But it doesn't. I can't imagine why they worked yesterday and not today. Please help.
I apologise for driving everyone mad. I do try for a long time before I resort to the forum.