Exception when select question in "Design Question Paper" page

[thaihaquang]

I faced some issues when I was trying to select question. Below is the details

I checked the source code and I could see some problems

The questions may be undefined if the question_type is none.
Could you please help me to fix it?
Thanks !

[adityacp]

Can you tell us what action triggered this? Maybe a small GIF would help.