Bugs in content types

Is the a way to prevent a student to see solutions from view source? I just found out that all answers in hidden missing fields are visible in the view source to the students. That is a very unfortunate "feature". 

I have some older interactive videos in my moodle, which do not open on firefox/Ubuntu 16. (or 18, not sure at the moment). "Old" means, I created them last year.

The error says: Flash could not be loaded/ shown.

Same Pc, newer created interactive video was no problem. But other older ones where reported to not been shown on other devices too, I just don't know which system/browser was used there...

Hi -

Using Wordpress 4.9.8

I am not sure if Wordpress has recently updated but last week I could create quizzes and now when I select a content module it goes into a never ending loop of 'loading'

I have tried on the work PC Windows 7 and on the home Mac OS but get the same result.

Any ideas?