Cannot add a new question to my quiz

Hi e-learning heros,

For some reason Rise doesn't give me the option to add another quiz question here. When I first created the quiz it did let me - but now that I need to edit it, I can't add any further questions. What am I doing wrong?

https://rise.articulate.com/author/oWnc5zQPb11JJsz360sLa5uwZR6fVfLE#/author/details/W0TIqbjP1Hf7ajt0mYrB8pW6o_L0u62q

Cheers,

Pip  Fowler