Quiz (Question Set)

When I go into an existing Quiz Set in my H5 editor in WordPress the questions show that they are loading but in the end, they never load no matter how long I wait, making it impossible to update. If anyone else has experienced this issue I would love to know if/how you were able to resolve it. Here is a little more context. 

A number of my H5P question set components have broken on Moodle. The ‘broken’ components are looking like this:

The Single Set question type has a sound effect option. Can this be added to the Multiple Question Set type as well? Currently it's not there.